Romesco is a sauce from Catalonia and served with fish, poultry, meats and vegetables. There is no one recipe or ingredient list. Invariably it has tomatoes, garlic, olive oil, almonds and mild chiles.
Cut peppers into quarters and remove seeds.
Halve the tomatoes.
Oil and season them and lay them skin side up on a grill tray.
Grill until the skins are blistered.
Peel away the skins when cool.
In a frying pan over medium heat, add 1 tbsp oil.
When hot, add the nuts and fry until golden all over.
Chop the garlic.
Heat a tablespoon of oil in the pan and fry the breadcrumbs and garlic until golden and crisp.
Place the garlicky crumbs, tomatoes, peppers and nuts in a blender and pulse to a rough paste.
Add the vinegar, season with salt and pepper and blend for 10 seconds.