Seared Sirloin Steak with Onion Relish

Name: Seared Sirloin Steak with Onion Relish
Ingredients: 1 tablespoon honey; 3 tablespoons sherry vinegar; Coarse salt and freshly ground pepper; 1/4 cup olive oil, preferably Spanish, plus more for skillet; 1/2 red onion, finely chopped (about 1/2 cup); 1 tablespoon minced garlic, (2 medium cloves); 1/3 cup brine-cured pitted green olives, such as Picholine, cut into 1/4-inch-thick rounds; 1 navel orange, peel and pith cut off, flesh cut into 1/2-inch cubes; 1/4 cup coarsely chopped fresh flat-leaf parsley, plus sprigs for garnish; 1 (1 1/2 pounds and 1 inch thick) boneless sirloin steak