Meanwhile combine all of the ingredients for the dressing (olive oil, vinegar, lemon juice, garlic clove, mustard, salt, pepper, and pinch of sugar) in a small bowl or clean jam jar and whisk or shake to emulsify. Taste and add more oil or vinegar per your preference. Add more salt or pepper as needed.
½ cup olive oil, 2 tablespoons red or white wine vinegar, 2 tablespoons lemon juice, 1 small garlic clove, ½ teaspoon Dijon mustard, ½ teaspoon salt, ¼ teaspoon ground pepper, 1 pinch sugar