Place potatoes in shallow 1 1/2- to 2-quart microwave-safe dish. Cover with plastic wrap, venting one corner. Microwave on HIGH 8 to 10 minutes until tender; cool. In separate bowls lightly toss potatoes and tuna with 2 tablespoons vinaigrette each; set aside. Line platter with lettuce. Arrange potatoes, tuna and remaining ingredients except vinaigrette on lettuce. Drizzle with remaining vinaigrette.
NOTE: Microwave cooking times are based on a 700-watt microwave. Adjust cooking times to your own oven. Menu: Brown-and-Serve Rolls, Lemon Pie
Nutritional Information Per Serving: 290 calories; 21 g fat; 10 mg cholesterol; 1330 mg sodium; 41 g carbohydrate; 5 g fiber; 25 g protein.
Source: The Potato Board