If using canned beans, drain and rinse them well. If using dry beans, cook them ahead until soft and creamy.
Add white beans, garlic clove, olive oil, lemon juice, lemon zest, and salt to a food processor.
Start blending, slowly pouring in the iced water. Blend for about 4 minutes, or until smooth and creamy, stopping to scrape down the sides as needed. If using a high-speed blender, you may need to stop and restart a few times.
Taste and adjust with more salt or lemon juice, if needed
Transfer to a bowl, drizzle with olive oil, and enjoy with veggies or pita chips.