Festive Tuna Salad

INGREDIENTS

• 2 tablespoons olive oil
• 1/2 cup diced (1/4 inch) peeled hothouse cucumber
• 1/2 cup diced (1/4 inch) seeded tomato
• 1 1/2 to 2 teaspoons very finely diced red jalapeño or other chili, seeds and ribs removed
• 2 tablespoons fresh lemon juice
• 3 scallions (3 inches of green left on), very thinly sliced
• 2 tablespoons chopped fresh cilantro leaves, for garnish
• Salt to taste
• Salt and freshly ground black pepper, to taste
• 3 tablespoons fresh lime juice
• 4 tuna steaks (each 6 to 8 ounces), cut 1 inch thick
• Freshly ground black pepper, to taste
• 1/2 cup diced (1/4 inch) pineapple