Ground Beef-Spinach Casserole

Details

Ingredients

• 1 pound ground beef
• 1 medium onion, chopped
• 1 clove garlic, minced, or more to taste
• 1 (10 ounce) can sliced mushrooms, drained
• 1 teaspoon dried oregano
• 2 dashes hot pepper sauce, or more to taste
• salt and ground black pepper to taste
• 2 (10 ounce) packages frozen chopped spinach, thawed and drained
• 1 (10 ounce) can condensed cream of celery soup
• 1 cup sour cream
• 1 (8 ounce) package grated mozzarella cheese