- 1 (1/2-pound) skirt steak, cut crosswise into 4 pieces
 - 1 cup coarsely chopped flat-leaf parsley
 - 2 large garlic cloves
 - 2 teaspoons dried oregano
 - 1/2 teaspoon dried hot red-pepper flakes
 - 1/4 cup fresh lime juice
 - 2/3 cup olive oil
 - Equipment: a large (2-burner) ridged grill pan (preferably cast-iron)
 
- Heat grill pan over medium-high heat until hot, then lightly oil. Pat steaks dry and sprinkle all over with 1 teaspoon salt and 1/4 teaspoon black pepper (total).
 - Grill steaks, turning over occasionally, 2 to 8 minutes total for medium-rare (depending on thickness of meat). Transfer to a platter and let stand 5 minutes.
 - While steaks are grilling, purée remaining ingredients with 3/4 teaspoon salt in a blender until smooth.
 - Serve steaks with sauce.