Salvitxada

Salvitxada () or "salsa de calçots" is a Catalan sauce originating in Valls, in Tarragona, which is served almost exclusively with calçots at the "calçotades", a traditional local barbecue.
It is similar to romesco sauce with the difference that it is thickened with toast rubbed with fresh garlic, moistened with a little vinegar and pulverized.