Preheat oven to 375°.
Place bread slices in a food processor, and pulse 10 times or until fine crumbs measure 1 1/4 cups.
Heat a medium nonstick skillet coated with cooking spray over medium-high heat. Add onion; sauté 4 minutes or until lightly browned. Place onion in food processor. Add bell peppers, and pulse 10 times or until the bell peppers are chopped.
Combine breadcrumbs, onion mixture, cheese, pesto, salt, turkey, beef, and egg. Divide beef mixture into 9 equal portions, shaping each into a (3 x 1-inch) loaf. Place loaves on a broiler pan coated with cooking spray. Bake at 375° for 18 minutes or until lightly browned. Spoon about 1 1/2 teaspoons sauce over each loaf. Bake an additional 10 minutes or until a thermometer registers 160°.