Answer:

plain

AnswerCrossword Clue
PLAINBagel variety
PLAINWithout toppings
PLAINEveryday
PLAINHamburger order
PLAINWith nothing on top
PLAINNo-frills
PLAINVanilla
PLAINBagel choice
PLAINBare-bones
PLAINNothing fancy
PLAINWith nothing added
PLAINUnadorned
PLAINGarden-variety
PLAINWithout extra toppings
PLAINUnvarnished