I usually cook something moderately edible and feed everyone before we play Amber. Nothing fancy, as my kitchen barely has room for two people to stand (the joys of living in a student apartment), but generally something edible.
I do this for a few reasons.
First one: Fed gamers are happier than hungry ones, and as we are eating people get to talk about comics, games, daily life and politics.
Second one: I like offering people food to eat.
Third: Amber has player contributions – players get points for their characters by agreeing to write game reports, draw trump cards, etc. I’ve got a GM contribution to balance things a bit. This shows certain commitment to the game, which I think makes it better.
Fourth: I think that everyone benefits from eating with other people once a while. This includes roleplayers living by themselves or in cell apartments.
This habit I highly recommend.
Easy food without recipes
Soup: Take some source of protein and enough cookable vegetables to make the food not too depressing. Add sufficient fat so the food contains enough energy that people won’t get hungry. Add salt and spices.
Omelette/etc.: Take eggs. Take whatever bits and pieces of edible matter you can find. Cook those that need it. Once everything else is ready and on the hot frying pan, add the eggs, salt and spices.
Meat and veggies: Take a lot of vegetables that can be eaten with little preparation. Fry meat or some other source of protein, add spices and salt.