Simple whip together with quickly here--and you'll be looking for tons of ways to use this incredibly delicious blend of feta and garlic. I like to use a microplane grater for an easy and very finely minced garlic. Feta typically is sold in 7- or 8 oz. slabs; either works fine here. This recipe scales up like a dream.
In a small food processor or blender, crumble the feta and add the labneh and garlic. Pulse until the mixture is fairly smooth, stopping and scraping down the sides of the bowl as you go.
In a small bowl, combine the sumac, sesame seeds, and red pepper flakes.
Spoon the whipped feta onto a small bowl or plate. Swirl the top. Drizzle with olive oil, then top decoratively with the spice blend. Serve immediately.