Ingredients

1 onion, cut into 1 inch pieces
1 green bell pepper, cut into 1 inch pieces (cored and seeded)
1 red bell pepper, cut into 1 inch pieces (cored and seeded)
1 bunch cilantro or flat leaf parsley
6 cloves garlic
1 tablespoon olive oil
2 teaspoons salt
1 teaspoon fresh ground black pepper
1 lb flank steak, scored on both sides

Directions

For the sofrito: puree onion, bell peppers, cilantro and garlic in a food processor; add olive oil, salt and pepper.

Spread 1 cup of the sofrito over the flank steak, working it into the scored crevices of the meat with your fingers; allow the meat to marinate for at least 30 minutes but 2-3 hours is best.Prepare grill or broiler; grill or broil the meat to the desired doneness, about 8 minutes per side for medium rare.Let stand 5 minutes then slice.Refrigerate or freeze the rest of the sofrito to use in another dish- it goes really well with sauteed chicken.