hmm, we eat a lot of salad...dd1 did a perpetual lettuce at school a year or so ago & it went on and on and on forever! Peppers go in everything (not literally but I do use loads of them). We eat anything and everything really, none of us is too fussy
FIL is doing onions/cabbages at the allottment, they were bigger than dd2's head last year & I still have some of each frozen.
dp said do mushrooms in the garage...he got a but I might see about if it's do-able.
We have a tiny veg patch. Last year's success was herbs, strawberries, carrots. Also had pak choi and peas which we mucked up but would have been okay. Rhubarb did badly and sunflowers took up loads of space.
Everything we tried was recommended as small child friendly.
This year we'll do sunflowers again but fewer, kale, strawberries, carrots, beans, herbs... And do better with planting only a week's worth at a time.