Ingredients
1 shallot or 1/2 small onion, finely chopped
1 Tbsp. finely chopped flat-leaf parsley
1-1/2 tsp. minced garlic
1/2 tsp. coarsely ground pepper
1/4 cup cider vinegar
1/4 tsp. salt
2 Tbsp. thinly sliced green onions, white and light green parts only