To make the marinade: Combine all of the ingredients in blender and puree until smooth. Transfer to bowl. (The marinade can be made up to 2 days in advance covered and refrigerated.)
To marinate the chuleta: Transfer the pork to the marinade and marinate at room temperature for 10 to 15 minutes.
Put bread crumbs in a plastic bag. Add pork and using the palm of your hand, pat bread crumbs onto pork so that it adheres well.
Heat a large skillet over medium-high heat. Add enough oil to lightly coat the bottom of the skillet. Working in batches, add the pork and cook, turning once, until lightly browned and cooked through, about 5 mintues per side.
Serve with the aji, red beans, rice and sweet bananas (maduros) for an authentic Colombian dish.
In a blender, pulse jalapenos with water, vinegar, and lemon juice until finely chopped. Pour into a bowl. Add scallions and cilantro. Add about 2 teaspoons salt or more to taste.