Tuna Salad for Two

Ingredients

• 1 (6-ounce) can light water-packed tuna, drained and flaked
• 2 tablespoons red onion, finely chopped
• 1 teaspoon fresh parsley, minced
• 1 1/2 teaspoons dillweed
• 1/8 teaspoon garlic salt
• 1/8 teaspoon dried thyme
• 1/8 teaspoon pepper
• cayenne pepper, to taste
• 2 tablespoons fat-free mayonnaise
• 1 tablespoon reduced-fat sour cream
• 3 cups Boston lettuce leaves
• 6 grape tomatoes, sliced
• cucumber, optional, to taste, sliced
• fresh dill, optional, to taste