Kachumber Tilapia

Name: Kachumber Tilapia
Ingredients: 1/2 cup fresh lime juice (from about 4 limes); 2 garlic cloves, minced; 2 tablespoons minced fresh ginger; 2 small Indian green chiles or serrano chiles, finely chopped; 1 teaspoon red chile powder; 1/2 teaspoon kosher salt; 4 tilapia fillets (1/2 pound each); 2 tablespoons olive oil, for cooking the fish; 1 Persian cucumber or 1/2 English cucumber, finely diced; 3 medium Roma tomatoes, seeded and finely chopped; 1 tablespoon finely chopped fresh cilantro (stems and leaves); 1 tablespoon fresh lime juice (from about half a lime)