Cheesy Stuffed Onion Casserole

Ohhh Ashley — you’re going to love this one 😍🧅🧀
This Cheesy Stuffed Onion Casserole is pure comfort — tender onions filled with a creamy, cheesy mixture, baked until golden and bubbly. It’s cozy, elegant, and perfect as a side or even a main dish!

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🧅 Ingredients

• 4–6 large yellow onions (peeled)
• 2 tablespoons butter
• 2 tablespoons olive oil
• 1 cup cooked rice (or mashed potatoes if you want it extra creamy)
• 1 cup shredded mozzarella cheese
• ½ cup shredded cheddar or Gruyère cheese
• ½ cup grated Parmesan cheese, divided
• ½ cup sour cream (or cream cheese)
• 2 cloves garlic, minced
• 1 teaspoon thyme (fresh or dried)
• ½ teaspoon paprika
• Salt and pepper, to taste
• ½ cup breadcrumbs
• Fresh parsley, chopped (for garnish)

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