Turkey Burgers with Ricotta

Ingredients

• 2 tablespoons olive oil
• 2 medium shallots, minced
• 2 garlic cloves, minced
• 1 1/4 pounds ground turkey
• 1 tablespoon Dijon mustard
• 2 teaspoons Worcestershire sauce
• 1/3 cup ricotta cheese, whole milk or skim
• 6 kaiser rolls or hamburger buns, lightly toasted
• 6 leaves lettuce, such as romaine or red-leaf, torn into pieces
• 6 slices beefsteak tomato
• 6 red onion slices, optional
• 6 slices sharp cheddar cheese
• Condiments: Mustard, Mayonnaise