Restaurants are doing more of this than most people think.

Here's an article from the head chef from a commercial microwave oven company, on how to get more done faster.[1] Commercial microwave ovens have about 2KW-3KW of power, and some of them have true variable power, not the on/off thing most home microwave ovens use. "I’ve shown teams how to make mug cakes, molten chocolate brownies, and steamed puddings with just a microwave. The reactions are always the same: "I had no idea a microwave could do that.”"

[1] https://totalfood.com/revolutionizing-microwave-cooking-comm...