Measure all ingredients into a bowl, blender, or jar.

Combine the vinaigrette: If using a bowl, use a fork or whisk to rapidly blend the vinaigrette together. If using a jar, top with the lid and shake until the vinaigrette is combined. If using a blender, blend until the vinaigrette is thoroughly combined.

Taste the vinaigrette: Dip a leaf of salad into the vinaigrette and give it a taste; tasting the dressing with the greens gives you a better idea of how the vinaigrette will taste with a salad than if you taste it on its own.

Adjust the taste: Add more olive oil for a more mellow flavor, more vinegar or lemon juice for more tartness, and more of any of the other ingredients to taste. Whisk, shake, or blend to combine.

Use the vinaigrette: For a side salad for 2 to 4, start with a tablespoon of dressing, toss, and continue adding until the greens are evenly coated and look glossy. Serve immediately.

Store the vinaigrette: Transfer leftover vinaigrette to a jar or other container with a lid (if it's not already in a jar). If the vinaigrette contains any fresh ingredients, like lemon juice or minced shallots, store it in the fridge. Vinaigrettes will keep for 3 to 5 days; shake to recombine the vinaigrette before using.