In a large skillet, heat 2 tablespoons olive oil over medium-high. Add onion and saute until translucent, 6 to 7 minutes. Add garlic and curry powder and cook until fragrant, 1 minute. Add 1/4 cup water, scraping up browned bits with a wooden spoon.
Transfer mixture to a food processor; add chickpeas, yogurt, lime juice, and 2 tablespoons oil. Season with salt and pepper and puree. Serve with a dollop of yogurt and sliced cucumbers.
To store, refrigerate in an airtight container, up to 2 days.