The humble radish deserves it's on thread.
Radishes are *loaded* with vitamins. I've thrown them sliced up in stir-fries, not a lot but a few...they add a little taste which seems to add some depth or solidness to the other vegetables...the loud radish taste is reduced greatly, though. The greens are super-greens, though again have a rather loud taste. Whereas we cook a big pot of collards we cook a much smaller amount of radish greens and eat smaller portions of it. The greens are also good in stir-fries!
The last ones I grew were Cherry Bells and they grew great with little trouble.
Fast and easy to grow, tasty with some spiciness, and very healthy. Win, win, and win!!!