If using fresh bell peppers, roast to develop char on the skin.Place in a bowl and cover with plastic wrap to allow them to steam.
Remove skin and seeds after 15 minutes. Reserve peppers.
In a 350° oven, roast the almonds for 10 minutes.Remove from the oven and allow to cool.
Toast the slice of sourdough bread in a toaster.
Assembling the Romesco Sauce
In a food processor, add the almonds and garlic.Pulse to breakdown but not mince.
Add the roasted bell peppers and canned tomatoes.Pulse to breakdown the peppers and tomatoes into ¼-½" pieces.
Add the vinegar (sherry or red wine), Extra Virgin Olive Oil, Spanish Paprika and Kosher Salt.Turn on the food processor and let run for about 5-10 seonds.
Break apart the toasted bread into pieces and add to the food processor.Let run to break down the toast.
The finished sauce should be thick with bits of almond, garlic and even small pieces of toast chopped fine.Leaving the sauce with small pieces gives it a texture reminiscent of making in a mortar and pestle.Hold at room temperature until ready to use. Refrigerate if using more than 1 hour from now.Enjoy!