Casserole Spaghetti

Ingredients

• 1 1/2 pounds ground round
• 1 1/2 cups chopped onion
• 1 cup chopped green bell pepper
• 1/2 cup chopped celery
• 2 garlic cloves, crushed
• 1 (10 3/4-ounce) can reduced-fat, reduced-sodium cream of mushroom soup, undiluted
• 3/4 cup water
• 1 (14.5-ounce) can no-salt-added whole tomatoes, undrained and chopped
• 2 tablespoons chili powder
• 1/8 teaspoon salt
• 1/4 teaspoon pepper
• 1 (8-ounce) package spaghetti
• 2 ounces reduced-fat sharp Cheddar cheese, cut into 1/2-inch cubes
• 2 tablespoons chopped pimiento-stuffed olives
• Cooking spray
• 1/2 cup (2 ounces) shredded reduced-fat sharp Cheddar cheese