In a small bowl, combine the first 4 ingredients. In another bowl, whisk sugar, vinegar, oil and pepper; stir into bean mixture. Cover and refrigerate until serving.
Three Bean Salad Tips
How can you make Three Bean Salad your own?
To make Three Bean Salad your own, play around with the ingredients. Substitute drained and rinsed garbanzo beans or even thin fresh asparagus spears for the waxed beans. Not a fan of canned green beans? Use fresh or frozen; just be sure to blanch them first! For the kidney beans, feel free to use black beans instead. Or stir in chopped celery for added crunch.
Can you make Three Bean Salad ahead of time?
Yes! You can make Three Bean Salad ahead of time. (Doing so actually helps the flavors blend better.) The salad will stay fresh in a covered container in the fridge for 3-5 days.