Turkey Pesto Sandwiches

Ingredients

• 1/4 cup fat-free mayonnaise
• 1 tablespoon commercial pesto
• 1 teaspoon fresh lemon juice
• 1/2 teaspoon dried oregano
• 1/8 teaspoon black pepper
• 4 (2 ounce) French bread rolls
• 2 cups trimmed arugula
• 8 ounces thinly sliced cooked turkey breast
• 8 (1/4-inch-thick) slices tomato
• 4 (1 ounce) slices part-skim milk mozzarella cheese