Hamburger Supreme Casserole

Ingredients

• 1 lb lean ground beef
• 1 small onion, chopped
• 1 (10.5 oz) can cream of mushroom soup
• 1/2 cup milk
• 1/2 teaspoon garlic powder
• 1/2 teaspoon dried thyme
• 1 (4 oz) can mushrooms, drained
• 2 cups macaroni, uncooked
• 2 cups sharp cheddar cheese, grated
• Kosher salt and freshly ground black pepper, to taste