Ranch. It's an American staple condiment. There are plenty of completely homemade recipes, but I find this one is particularly easy, and I always have these ingredients on hand.
There are quite a few vegan mayonnaise's on the market these days. Typically I will use the Just Mayo or Follow Your Heart brand. Both have good flavor and consistency. You can also make your own mayonnaise, and I have a recipe for this in my cookbook Simply Fresh, found on page 103, for those that have it.
1/2 cup vegan mayonnaise (I like Follow Your Heart)
1 Tablespoon lemon or lime juice
1/2 teaspoon onion powder
1/4 teaspoon garlic powder
1/4 teaspoon salt
1 teaspoon parsley
2 teaspoons dill
Place all ingredients into a small bowl and whisk together until mixed well. Place in a tupperware and store in refrigerator for up to 30 days.
For a homemade vegan mayonnaise that is oil free, you can find one in my cookbook, Simply Fresh. The recipe is found on page 103 for those of you who have it. If not, you can still get yours! There are plenty of other homemade condiments in my cookbook as well.