Casserole for a Crowd

Ingredients

• 2 pounds ground beef
• 1 large onion, chopped
• 8 ounces wide egg noodles, cooked and drained
• 1 can (15-1/4 ounces) whole kernel corn, drained
• 1 can (15-1/4 ounces) peas, drained
• 1 can (8 ounces) mushroom stems and pieces, drained
• 4 cups shredded cheddar cheese, divided
• 1 can (10-3/4 ounces) condensed cream of celery soup, undiluted
• 1-1/4 cups whole milk
• 1 tablespoon chili powder
• 1 tablespoon Worcestershire sauce
• 2 teaspoons salt
• 1/4 teaspoon pepper
• 1/4 teaspoon garlic powder