Grilled Tuna With White Bean and Charred Onion Salad

Cooking Light.

• Ready In: 30 mins
• Serves: 4

Ingredients

• Tuna

• 1  tablespoon  grated lemon rind
• 2  tablespoons fresh lemon juice
• 1⁄2 teaspoon Dijon mustard
• 1⁄2 teaspoon olive oil
• 1⁄4 teaspoon fresh ground black pepper
• 1  garlic clove, minced
• 4 (6 ounce)  tuna steaks
•  cooking spray

• Salad

• 1  medium  vidalia onions or 1  medium other sweet onion, cut into 1/4-inch-thick slices
• 3  tablespoons red wine vinegar
• 1  tablespoon olive oil
• 1⁄4 teaspoon salt
• 1⁄4 teaspoon fresh ground black pepper
• 1⁄4 teaspoon Dijon mustard
• 1  garlic clove, minced
• 1⁄2 cup  chopped seeded peeled cucumber
• 1⁄4 cup  chopped flat leaf parsley
• 1  tablespoon capers
• 1 (15 ounce) can cannellini beans, rinsed and drained
• 6  cups  mixed salad greens

Directions

1. Prepare grill.
2. To prepare tuna, combine the first 6 ingredients in a large zip-top plastic bag. Add tuna to bag; seal.
3. Marinate in refrigerator 30 minutes, turning once. Remove tuna from bag; discard marinade. Place tuna on grill rack coated with cooking spray; grill 2 minutes on each side or until desired degree of doneness.
4. To prepare salad, place onion slices on grill rack coated with cooking spray; grill 5 minutes on each side or until tender. Cool and chop.
5. Combine vinegar and next 5 ingredients (through garlic) in a large bowl, stirring with a whisk until blended.
6. Add onion, cucumber, parsley, capers, and beans to vinegar mixture; toss to coat. Arrange 1 1/2 cups salad greens on each of 4 plates.
7. Top each serving with about 1/2 cup onion mixture and 1 tuna steak.