Spicy Tuna Wrap

Name: Spicy Tuna Wrap
Ingredients: 2 5- to 6-ounce cans chunk light tuna (see Notes), drained; ⅓ cup low-fat mayonnaise; 1 tablespoon hot sauce, such as Sriracha (see Notes); 1 scallion, chopped; 2 cups cooked brown rice (see Tip), cooled; 2 tablespoons rice vinegar; 4 10-inch whole-grain wraps; 3 cups watercress leaves; 1 ripe avocado, cut into 16 slices; 1 small carrot, cut into matchsticks; Reduced-sodium soy sauce for dipping (optional)