This is how:
Put the following ingredients into a microwave bowl (I never measure):
- tomato paste
- cut onion
- garlic, either granules or fresh
- salt and pepper and any other spices, optional according to your preference
Zap* it! Then mix, and you may need to zap it again. It depends on how you're going to be using it. If it's going to be added to other food for more cooking, then you need less "zaps." If it's served separately, then the onions should be soft.
I make it almost every week for a Pasta with Tomato Sauce side dish. I add it to already-cooked (left-over) pasta and then zap again.
*Remember that every microwave is different, so I'm not giving times and settings.
And a special reminder,