I've just worked out why, and it's because of a sequence of seemingly unrelated facts...
- I'd made some muffins for breakfast at the weekend with some cheap sausages that gave off a lot of fat and I haven't cleaned the grill pan yet.
- The bedroom I use for an office is directly above my kitchen, but the stairs are in the opposite corner of the house, making me 2 hypotenuses and 1 storey away from the kitchen.
- I bought a pizza for tea tonight as I was feeling a bit lazy, and in my haste to scoff it I didn't turn the oven off. I *did*, however turn the grill on instead without realising.
The result: my grill has been happily turning the fat from the sausages to a very thin smoke for the last 5 hours and I didn't notice. My eyes did, however, and they want to close now.
And that is how not to cook pizza.