2/3 cup chopped cucumber |
1/4 cup minced red onion |
1/4 cup fat-free italian salad dressing |
2 tablespoons chopped fresh parsley |
2 tablespoons fat-free buttermilk |
1 (15 1/2 ounce) can cannellini beans (such as goya) or 1 (15 1/2 ounce) can other white beans, rinsed and drained (such as goya) |
1/2 teaspoon salt, divided |
1/4 teaspoon black pepper, divided |
4 (6 ounce) bluefin tuna steaks (about 3/4 inch thick) |
cooking spray |
lemon wedge |