Make the Dressing: In a very large bowl, whisk together the olive oil, red wine vinegar, garlic, salt and black pepper until smooth.
Prepare the Salad: To the same bowl, add the chickpeas, navy or cannellini beans, kidney beans, chicken, tomatoes, cucumber, red onion, roasted red peppers, parsley and feta, tossing to combine.
Taste and adjust seasoning as needed.
Optional: Chill for 30 minutes, or overnight, for flavors to combine. Serve as a main, side, or wrap filling.
Notes
Chicken: I like to chop the chicken pretty small so it grabs onto the dressing better and better matches the size of the beans, but shredding it also works.
Roasted Red Peppers: To make prep easier, I use jarred roasted red peppers (drained) in this recipe.