Make the dressing by combining all vinaigrette ingredients in a bowl or screw top jar until emulsified. Makes about 1 cup.
In a food processor, blend the white beans until it forms a paste. Add tahini, garlic, lemon juice, and salt and process until combined. Add the ice water and blend until completely smooth. Taste for seasoning.
Spread the white bean hummus over a platter or shallow bowl.
In a large bowl, toss the salad ingredients with enough dressing to coat lightly and mound over the hummus.