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Tennessee Onions: The Easy, Cheesy Casserole You Have To Try
This old-fashioned onion casserole is unlike any side dish you've had before.By Julia Levy
Updated on March 21, 2024
Active Time:
10 mins
Total Time:
1 hr 20 mins
Servings:
10
Ingredients
- Cooking spray
- 2 1/2 lb. sweet onions (about 3 large onions), sliced crosswise into 1/4-in.-thick slices and separated into rings
- 1 tsp. dried thyme
- 1 tsp. dried parsley flakes
- 1 tsp. garlic salt
- 1/2 tsp. dried oregano
- 1/2 tsp. dry mustard
- 1/4 tsp. cayenne pepper
- 1/4 cup salted butter, cut into 1/4-in.-thick pieces
- 4 oz. mild Cheddar cheese, shredded (about 1 cup)
- 4 oz. smoked Gouda cheese, shredded (about 1 cup)
Directions
Warm the oven:
Preheat oven to 350°F. Coat a 13- x 9-inch baking dish with cooking spray.
Gather your ingredients.Season the onions:
Place onions in a large bowl. Sprinkle with thyme, parsley, garlic salt, oregano, mustard, and cayenne pepper; toss gently to coat.
Arrange evenly in prepared baking dish.Add toppings and bake:
Arrange butter evenly over onions, and sprinkle with Cheddar and Gouda.
Cover with aluminum foil, and bake in preheated oven until onions are soft and sides are bubbly, about 40 minutes.Finish baking:
Remove foil. Bake at 350°F until top is golden, about 30 minutes.
Tennessee Onions: The Easy, Cheesy Casserole You Have To Try
Tennessee onions is an old-fashioned onion casserole unlike any side dish you've had before. Learn how to turn sweet Vidalia onions into a tender, flavorful side.
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