Delicious Potato and Vidalia Onion Au Gratin

Potato and Vidalia Onion Au Gratin is a sponsored post in partnership with The Network Niche Influencer Agency and VidaliaOnion.org. All opinions are my own.

Yay, the Vidalias are here! The world’s best (and first) sweet onion has arrived! Vidalia onions are exclusively available from April through August, so I’m stocking up on these sweet, juicy bulbs.

Potato And Vidalia Onion Au Gratin Completed Dish

Vidalia onions are incredibly versatile and add flavor to any dish that calls for onions. My Potato and Vidalia Onion Au Gratin is delicious and really showcases my favorite onions.

I have a special place in my heart for Vidalia onions. I was born and raised in South Georgia and I’ve been enjoying Vidalia onions ever since I was a little girl. Whenever I visit my hometown in spring or summer, my dad has plenty of Vidalia onions on hand.

My favorite onions have been cultivated for more than 80 years and they are all planted by hand. Each winter, growers plant over 80,000 Vidalia onion seedlings per acre!

Vidalias, how did you get so sweet?

Vidalias get their sweet flavor through the perfect combination of low sulfur soil, water, and the weather uniquely found within 20 South Georgia counties. There are only 100 registered South Georgia growers that produce the Vidalia onion crop each year so you know you’re getting the real deal!

World-class chefs and home cooks like me consider Vidalia onions to be the sweetest and most versatile in their category. These onions are sweet, crisp and have a distinctive flavor like no other. It’s the only onion I use to make onion rings.

Potato and Vidalia Onion Au Gratin

Slice red potatoes 1/8″ thick. I use a mandoline to ensure my slices are even. Set aside.

Ingredients - Vidalia Onion Au Gratin

Melt butter in a large skillet over medium heat. Add Vidalia onion slices and cook, stirring constantly, until softened, about 5 minutes.

Cook Onions to Make Vidalia Onion Au Gratin

Add chicken stock and minced garlic, stirring occasionally, until liquid has evaporated. Remove from the heat and season with salt and pepper.

Combine cheeses in a bowl and set aside. Stir together the milk, cream, and flour. Set aside.

Cover the bottom of a buttered casserole dish with sliced potatoes, overlapping slightly. Sprinkle lightly with salt and pepper.

First Layer - Vidalia Onion Au Gratin

Add a layer of Vidalia onions.

Add a Layer of Onions - Vidalia Onion Au Gratin

Add 1/3 of the cream mixture. Sprinkle with 1/3 of the cheese.

Add layer of cheese to make Vidalia Onion Au Gratin

Repeat layering process, using all but 2 Tablespoons of the cheese. Arrange remaining potatoes around the edge of the casserole dish. Pour any remaining cream mixture over the top.

End with a layer of potatoes - Vidalia Onion Au Gratin

Cover loosely with foil and bake for one hour or until bubbly. Remove foil and sprinkle with the remaining cheese. Bake for 3o-40 minutes more or until golden brown. Let cool on a wire rack for 10 minutes before serving.

How to Make Vidalia Onion Au Gratin

Potato and Vidalia Onion Au Gratin

Ingredients

  • 2 Tablespoons unsalted butter
  • 3 cups sliced Vidalia onions
  • 1/4 cup chicken stock
  • 2 cloves garlic, minced
  • 1 teaspoon salt
  • 1/2 teaspoon pepper
  • 2 pounds red potatoes, sliced into 1/8" thick rounds
  • 1 cup grated Gruyere cheese
  • 1 cup grated Parmesan cheese
  • 2 Tablespoons flour
  • 1/2 cup milk
  • 1-1/2 cups heavy cream

Instructions

  1. Preheat oven to 350º F
  2. Butter a 3-quart casserole dish and set aside.
  3. Melt 2 Tablespoons butter in a large skillet over medium heat. Add Vidalia onion slices. Stir constantly until softened, about 5 minutes.
  4. Add chicken stock and minced garlic, stirring occasionally until liquid has evaporated. Remove from heat and season with salt and pepper.
  5. Combine Gruyere and parmesan cheese in a bowl and set aside.
  6. In a separate bowl, whisk together the milk, cream and flour.
  7. Cover bottom of prepared casserole dish with potato slices, overlapping slightly. Sprinkle lightly with salt and pepper. Add a layer of onions. Add 1/3 of the cream mixture. Sprinkle with 1/3 of the cheese. Repeat layering process, using all but 2 Tablespoons of cheese.
  8. Arrange remaining potatoes around the edge of the casserole dish. Pour remaining cream mixture over potatoes.
  9. Cover loosely with foil and bake for one hour or until bubbly. Remove foil and sprinkle the remaining 2 Tablespoons of cheese.
  10. Bake for 30-40 minutes more or until top is golden brown and potatoes are tender.
  11. Let cool for 10 minutes before serving.
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My delicious Potato and Vidalia Onion Au Gratin is the perfect side dish when you’re grilling out. While my husband is manning the grill, I prepare the sides and this is one that always gets rave reviews.

How to Make Delicious Potato and Vidalia Onion Au Gratin

Be sure and visit your local grocery store to score the best onions in the world and share your Vidalia onion recipes on social media using #OnlyVidalia. I’d love to see them!

 

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About Alli

Southern, Morning Person, Jesus Girl, Frugal Party Planner, Writer/Blogger, Mom, Nana, Wife, Beach Bum Wannabe - Let's Have a Party!

Comments

  1. Oh yum! I just love onions so I know I’d love this. I’ll have to make this soon. It’s my kind of side!
    Amber Myers recently posted…How Did Mother’s Day Go?My Profile

  2. This looks tasty! I haven’t had au gratin like this one.
    Ashley recently posted…Black Panther Movie Night SnackMy Profile

  3. This sounds like a really delicious recipe I have admit we are trying to cook more from scratch of late so I am all about new things to try out!
    Sarah Bailey recently posted…Ten Tips For Travelling Alone with Vicky from Miss Tilly and MeMy Profile

  4. I’m guilty of buying the boxed version of this over the years. I’m definitely going to make this version. It looks and sounds so yummy!
    Heather recently posted…Hefty® Celebrates Strong MomsMy Profile

  5. This was a great recipe and I need to make it now that those onions are available. I just bought those onions and they were delicious so i need to keep them on hand.
    Melissa Chapman recently posted…4 Smart Tips To Help Encourage Your Child to Spend More Time Outdoors This SpringMy Profile

  6. Vidalias are so sweet I have seen people eat them like apples. This would be the perfect pairing of potato and visalia onions. There would be no leftovers in my house.
    candy recently posted…Morel MushroomsMy Profile

  7. This looks delicious! Cheesy, creamy potatoes and onion. Yum! Great side dish!

  8. Your potatoes look terrific! I’ve never had au gratin with a layer of onions in it, the flavor and texture sound rather intriguing.
    valmg @ Mom Knows It All recently posted…EZPlay Panda Playground Indoor Jungle Gym For Play Anytime AnywhereMy Profile

  9. This is such a great recipe! I would really love to dig into this one some time soon!
    Kita Bryant recently posted…10 Things you may not have known about meMy Profile

  10. This recipe looks delicious! I love recipes that include onions. I can’t wait to try and make this for my family.
    Tasheena recently posted…My Menu Plan Monday: Week of 5/14/18My Profile

  11. I always have backyard get togethers in spring and summer, and this dish is actually the perfect dish that will be a hit with my friends and family. I want to try it!

  12. I love onions and this dish reminds me a lot of my mom’s scalloped potatoes we used to eat about once a month.
    wendy recently posted…Three Easy Anti Stress Techniques-Be your own Stress CoachMy Profile

  13. That looks like a delicious meal! I’ve never battered my own onions before, but I have with zucchini. Yum!
    Heather recently posted…School is Almost Out For Summer!My Profile

  14. Such a mouthwatering and eye-pleasing dish! I really do want to make Potato and Vidalia Onion Au Gratin but unfortunately, I don’t have Vidalia onions available anywhere near me. So I’ll just use regular onions and pretend them to be Vidalia onions. 🙁
    Ushmana Rai recently posted…14 Easy and Refreshing Non-Alcoholic Drinks Recipes for SummerMy Profile

  15. Now this looks like my kind of recipe! I am potato addict, LOL! I will def be trying this soon!

  16. It looks packed with flavor and something that people would enjoy especially during parties! I love the onions, I think they’re a nice addition to the dish and the flavor would be really delightful! YUM!
    Karen Morse recently posted…5-Minute Face with 5 Makeup Items for a Summer GlowMy Profile

  17. This would be a lovely side to some steak or some grilled meat. It’s great on its own as well. I’d love to try the recipe! The onions look awesome!
    Alison Rost recently posted…The Prettiest Spring PastaMy Profile

  18. So many recipes that you can make with the vidalia onions. They look amazing and sweet. I love that you added them to the au gratin. It sure looks delicious!
    Carol Cassara recently posted…What’s the strangest food you’ve ever eaten?My Profile

  19. I love onions! This meal looks so delicious, I want to try it for my self asap. I also need to check out your vidalia onion recipe- it looks sooo tempting!
    Shoshana Sue recently posted…SUMMER RUNNING TIPS AND BEST RUNNING GEAR FOR SUMMERMy Profile

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