You don't need a lot of oil to make a delicious, smooth puree. Lemon, thyme, and garlic pump up the flavor without adding fat.
In a food processor, combine chickpeas, lemon juice, thyme, garlic, oil, and 1/4 cup water; process until smooth. Season with salt and pepper and process until combined.
Dividing evenly, dollop chickpea puree onto cucumber slices, top with a roasted red pepper strip and thyme leaves. Serve immediately.