In a blender, puree until smooth the garlic, ginger, soy sauce, and lime juice. Remove to a bowl and mix in the cilantro. Slice the tuna into thin, 1-inch long pieces.
Place tuna on a serving platter and spoon soy sauce mixture over each slice. Dot each piece with each of the purees, aji amarillo, and rocoto pepper.
Recipe courtesy Aaron Sanchez
Recipe courtesy of Robert Irvine