Yogurt dill sauce (for falafel)

I got the idea for making homemade falafel from this excellent blog , which was also the source for the garlic scape and basil pesto recipe. Here's Andrea's yogurt dill sauce that goes on top of the falafel, though I made a half recipe. It's good, and healthy too!

1/2 cup plain yogurt (I used Greek yogurt) 1 small clove of garlic, minced 3/4 tbsp. fresh dill, minced 1/4 tsp. lemon zest, minced 1/2 tsp. lemon juice salt and pepper