Heat grill to high (450° to 550°). Rub lamb chops with about 2 tbsp. oil and sprinkle with 1/2 tsp. salt. Grill, turning once, until done the way you like, about 8 minutes total for medium.
Combine mint, parsley, lime juice, jalapeño, onion, remaining oil, and remaining 1/2 tsp. salt in a medium bowl. Spoon over lamb.
Note: Nutritional analysis is per serving.