I don't know squat about growing vegetables and my girlfriend wanted to plant a garden. I planted about 20 radish plants. In 2 weeks we had enough radish to supply the neighborhood for the entire summer.
I call my garden the “lucky garden” because only what survives my abuse and neglect survives.
Still end up with tons of tomatoes (from like mid-June and still eating the last to ripen indoors now), kale, peppers, parsley, basil, random squash & zucchini.