If you want massive amounts, then soft things are your friend
Noodles, Soup or rice as main course.
And then a big pot of yoghurt or rice pudding as dessert.
Or a big pot of cereal that you've prepared an hour ago before main course so that it's soft and easy to chug down.
Fun rule: you need to eat the whole pot of desert that you're prepared, no matter how long it takes
What's your taste: do you prefer salty/hearty or sweet?