Step 1

Preheat oven to broil.

Step 2

Place the bell peppers on a baking sheet and broil on the top rack of the oven, using tongs to turn them as each side blackens. Place the blackened peppers in a plastic bag, tied loosely with some air inside, for 15 minutes. Remove the stems and peel the peppers. Discard the cores and seeds. Cut peppers into wide strips.

Step 3

Add the peppers, tomato paste, mayonnaise, sour cream, vinegar, garlic, and cayenne pepper in the bowl of a food processor. Pulse until almost smooth, 7 or 8 times. Salt to taste, if needed.

Step 4

Refrigerate until ready to serve.