This staple of Southeast Asian cuisine enhances all kinds of dishes, J. Kenji López-Alt writes. By J. Kenji López-Alt As a line cook in the early 2000s, I learned exactly how addicting fried shallots ...

To prepare the tuna with onion sauce, first take care of the onions: peel the onions, cut them in half (1) and slice them thinly (2). Heat a drizzle of oil in a saucepan and add the onions (3). Add ...