Healthy Casserole

Ingredients

• 1 lb. ground beef
• dash of oregano
• 1 tsp. salt
• 1/2 tsp. pepper
• 1 c. green pepper, chopped
• 1/2 c. onion, finely chopped
• 2 c. grated carrots
• 1/2 c. celery, finely sliced
• 1 c. Cheddar cheese, shredded
• 1 (15 oz.) can tomato sauce
• 3 Tbsp. Parmesan cheese
• 4 Tbsp. bread crumbs, fine
• 3 Tbsp. chopped parsley
• 1 Tbsp. butter