Onions, peppers, courgettes and tomatoes cooked down slowly in olive oil into a soft, sweet stew, often with a fried egg on top.
What makes it pisto manchego
Tomato, peppers and onion — courgette often, aubergine sometimes.
Cooked slowly in olive oil until soft, not browned.
Often a fried egg on top.
Where it comes from
It's the vegetable stew of La Mancha, made in summer from the market garden and eaten hot or cold. Its likeness to ratatouille is plain, and neither needs to be first: both are what hot countries do with summer vegetables and oil.
In La Mancha it's often topped with a fried egg and eaten with bread; elsewhere in Spain it goes on toast, into small pies, or beside meat.