Cheesy Hamburger Rice Casserole with Creamy Mushroom - cookrisp

Ingredients

• 1 lb ground beef
• 1 small onion, chopped
• 1 teaspoon garlic powder
• Salt and pepper to taste
• 1 can (10.5 oz) cream of mushroom soup
• 1 cup sour cream
• 2 cups cooked white rice
• 2 cups shredded cheddar cheese
• 1 teaspoon Italian seasoning (optional)
• Non-stick cooking spray