Place the sliced sausage in a heatproof dish and microwave at 600 W for 30 seconds.
The sausage will burst or harden if you overheat it, so be careful.
If you are cooking a whole sausage as-is, make sure to make a few cuts in it with a knife. Keep an eye on it, and adjust the cooking time as necessary.
Story Behind this Recipe
I microwaved a frozen wiener sausage, made cuts in it with a knife, and then heated it once more. It tasted as if it had been grilled.
I wondered if I could do the same with sliced sausages which I usually cook in the frying pan, and gave it a go.
The result will differ depending on the kind of sausage you use. I used sausages made from coarsely ground meat for this recipe. If you are cooking a few at the same time, keep an eye on them and adjust the cooking time as necessary. (You don't need to cover them with plastic wrap or a lid.)