Combine in a bowl, the mayo, sour cream, zest and juice of the half lemon, onion powder, salt, and chopped dill. Stir until well combined.
¼ cup Mayonnaise, ¼ cup Sour Cream, ½ piece Lemon, 1 teaspoon Dijon Mustard, 2 tablespoon Fresh Dill, ½ teaspoon Onion Powder, ¼ teaspoon Salt