Italian Pot Pies

Name: Italian Pot Pies
Ingredients: 1 tablespoon olive oil; 1 medium onion, finely chopped; 2 carrots, finely chopped; Coarse salt and ground pepper; 1 pound ground beef sirloin, thawed if frozen; 2 cups homemade or best-quality tomato sauce; 1 cup all-purpose flour, (spooned and leveled); ¼ cup grated Parmesan (1 ounce); 1 ½ teaspoons baking powder; ¼ teaspoon crushed dried rosemary; 4 tablespoons butter, melted; ½ cup whole milk