Begin by draining and rinsing the garbanzo beans and black beans under cold water.
In a large mixing bowl, chop the grape tomatoes, red onion, parsley, and mint into bite-sized pieces.
Finely mince the garlic clove for even flavor distribution.
Add the rinsed garbanzo beans and black beans to the bowl with the chopped vegetables and herbs.
In a small bowl, whisk together the olive oil, lemon juice, kosher salt, and freshly ground black pepper until well combined.
Pour the dressing over the salad ingredients and gently toss to combine, ensuring everything is well-coated.
Let the salad sit for at least 15-30 minutes to marinate and absorb the flavors.
Give the salad a final toss and serve as a side or light meal.