[wiredfool]

I liked the food service one I used years ago. 9 buttons, numbered 1-9, and they ran the oven for 10x seconds at a pop. Add one button/latch to open, and it was a simple as it could be.

Toss something in, hit 1 button, ding, open door.

[Moto7451]

My very cheap microwave does that same behavior only it's in minutes. It also has a 30 second button. Save for heating pancake syrup (a 10 second job) I rarely set a time explicitly or wait to cancel a button press early.