In a large skillet, add a dash of cooking oil and add garlic, onions, and spinach. Saute for a few seconds and remove from heat. Let cool and add cheese and mix. Lay a slice of smoked salmon out on a table and place a teaspoon of cheese mixture on top. Wrap salmon around cheese. Slice a small incision in the scallop side and place the salmon cheese mixture in the pocket. Grill on each side until done about 3 to 4 minutes. Mix vinegar and mustard together. Drizzle vinegar and mustard mixture over scallops and serve. Makes 4 portions.