Instructions: 1. Place potato in a saucepan; cover with water, and bring to a boil. Cook 15 minutes or until tender. Drain and set aside.

2. Coat a small nonstick skillet with cooking spray; place over medium-high heat until hot. Add tuna, and cook 3 minutes on each side until medium-rare or to desired degree of doneness. Break tuna into chunks.

3. Combine parsley and next 6 ingredients (parsley through pepper) in a medium bowl; stir well with a whisk. Add potato, tuna, and grapes; toss gently to coat. Serve on lettuce-lined plates.

Yield: 2 servings (serving size: 1 1/2 cups).

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