3 seared fish relish Recipes

chopped shallot, peanut or vegetable oil, fresh chile, minced , including seeds, firm-ripe mangoes, peeled, pitted , and cut into 3/4-inch pieces (3 1/2 cups), asian fish sauce such as thai nam pla or vietnamese nuoc mam, sugar, salt, fresh lime juice , or to taste, mahimahi fillet (1 to 1 1/2 inches thick) with skin, lime wedges

tuna , swordfish or shark steaks, but 1 to 1 1/4 inches thick, olive or vegetable oil, salt and ground black pepper, lemon wedges, or a pan sauce, uncooked relish, or flavored butter, bottled pure horseradish with liquid squeezed out, butter, at room temperature, vinegar, salt and ground black pepper