Step 1

1 Combine the bell pepper, ají chiles and garlic in a food processor; puree until fairly smooth, stopping to scrape down the sides halfway through

Step 2

2 Add the onion; pulse five to seven times, until the mixture is again blended into a smooth puree

Step 3

3 Add the culantro and cilantro; pulse five or six more times to form a loose paste

Step 4

4 Transfer to a container for serving or storing