A year ago (maybe more) There was a 600yen "Meal" at the Gundam Cafe that just had a Single piece of Bread (Not a Sandwich like shown here) and a Glass of water (Not on a Mug like shown here) which Reference the meal Amuro had before meeting Ramba Ral in person that this comic Reference.
To those wonder what the Bread tasted like it's just plain bread, not even salted (or atleast that what the people told me)
Then Sandwich here made of two piece of flat bread with Lettuce and vauge(Sauce/Filling) is a common sight when the animators just want to show the characters eating without much effort to put on it.