A couple of Chicago Town pepperoni pizzas from the microwave...
... but I have noticed a weird thing.
I usually have two - one after the other. I microwave the first one for exactly 3m10s on a small plate, and that is long enough to make sure it is cooked throughout. After a minute or two, I put another one on the same plate and microwave it for the exact same time - but this time it is still cold in the middle! It needs to go back in for at least another 20-30 seconds to be edible. I can only guess that the residual heat in the plate is making the plate absorb microwaves more, and hence the pizza is getting less heating.
I thought it was just a one-off, but it actually happens every time.