Tomatoes hollowed out and filled with tuna, boiled egg, onion and rice bound with mayonnaise. No cooking beyond softening the onion, and it takes twelve minutes. Serves six.
Keep the tomato walls intact. Scoop with a small spoon and stop when you can see the wall thinning: a tomato with a hole in the side spills its filling across the plate. Firm tomatoes hold up far better than very ripe ones. Do not throw away the pulp. It is the base of a sauce, or it can go into the filling itself if you drain it first, which some households do. Left as it is, it will make the mayonnaise watery, which is why the recipe leaves it out. Drain the tuna properly for the same reason. A tin holds a surprising amount of oil or brine, and any of it left in loosens the mayonnaise until the filling will not hold its shape. Assemble close to serving. Filled tomatoes weep after an hour or two and the rice softens.