Perhaps somewhat surprisingly, caesar salad dressing is basically a flavored (sometimes slightly thinned) mayonaisse. They're made exactly the same way. I haven't made mayonaisse yet, but the next time I have occasion to use it (like crab cakes) I certainly will.
Simple way to remember the recipe: two acids (lemon juice, vinegar), two emulsifiers (egg yolk, mustard), two pungent flavorings (garlic, anchovies), two liquids (Worchestershire sauce, oil). There are tons of variants, all of which will yield a good dressing with subtly different flavors. You can vary the type of acids, the kind of mustard, the amount of flavorings, and the type of oil. A light-flavored oil, like canola or light olive oil, is best.
Full recipe:
- 3 tablespoons lemon juice
- 2 tablespoons balsamic vinegar
- 1 egg yolk
- 1 tablespoon mustard, preferably dijon, whole-grain, or spicy
- 3-5 anchovy filets
- 3-5 garlic cloves
- 1 teaspoon Worchestershire sauce
- 1 cup canola or light olive oil
Again, this recipe is infinitely tweakable. I usually juice one lemon, then add enough vinegar to make 5 tablespoons total. You could omit the anchovies and Worchestershire sauce to make it both vegetarian and gluten-free. As much as I love garlic, it's easy to get carried away and make it way too garlicky.
And as for the salad, I love chopped romaine with croutons, and for a main dish, add roasted chicken breast. Top with grated parmesan (or my new favorite, manchego). Diced hard-boiled egg and fresh sliced mushrooms go great in it. (Carrots and cucumbers, not so much).
It's also great for replacing mayo for certain things. I just made a bacon-egg-tomato sandwich with it and it was amazing!