Add the chickpeas, butter beans, olives, shallot, herbs, and garlic into a serving bowl. Set aside.
Add all of the dressing ingredients to a jar or cup and whisk well until emulsified.
Pour all of the dressing on the salad and toss together well. Adjust for salt as needed and let sit at least 30 minutes before serving. Enjoy on toasted sourdough, or just on its own.