Seared Tuna with Mango Salsa

Name: Seared Tuna with Mango Salsa
Ingredients: 2 tablespoons good olive oil, plus extra for searing; 1 1/2 cups diced yellow onion (2 onions); 2 teaspoons peeled, minced fresh ginger; 1 1/2 teaspoons minced garlic; 2 ripe mangos, peeled, seeded, and small diced; 1/3 cup freshly squeezed orange juice; 2 teaspoons light brown sugar; 1 teaspoon kosher salt; 1/2 teaspoon freshly ground black pepper; 1 to 2 teaspoons minced fresh jalapeno pepper, to taste (1 pepper); 2 teaspoons minced fresh mint leaves; 2 tuna steaks