In a hurry the other night, I just plopped some sweet pickle relish into a small dish of mayonnaise.
I got this from AllRecipes.com and have used it before:
Simple Tartar Sauce
Basic recipe makes 1 cup, or 6 servings (modified: 2 servings)
1 cup (⅓ cup) mayonnaise
1 tablespoon (1 tsp) sweet pickle relish
1 tablespoon minced onion
2 tablespoons (2 tsp) lemon juice (optional) (start with 1, and taste it)
salt and pepper to taste
• PREP: 10 min.
• READY IN 1 hr 10 min.
Directions
In a small bowl, mix together mayonnaise, sweet pickle relish, and minced onion. Stir in lemon juice. Season to taste with salt and pepper. Refrigerate for at least 1 hour before serving.
Compliments deep-fried seafood and fish.