Light Shepherds Pie

Name: Light Shepherd's Pie
Ingredients: 1 1/4 pounds small red-skinned potatoes; 2 tablespoons extra-virgin olive oil; 1 small onion, finely chopped; 1 carrot, finely chopped; 2 large tomatoes, chopped; 1 1/2 tablespoons chili powder; Kosher salt; 1/2 pound 93 percent lean ground turkey; 1/2 pound 90 percent lean ground beef sirloin; 1 1/2 cups frozen peas; 1/2 cup low-fat milk, warmed; 1/3 cup shredded low-fat cheddar cheese