Joyfulhealthyeats.com
Make the whipped feta
Process all of the whipped feta ingredients in the food processor until smooth. Scrape the sides and mix well. Set it aside.
Form the patties & grill
Shape the ground beef into 6 patties for the burgers and season. Grill them for 3-4 minutes per side. Add the buns to toast.
Assemble and Serve!
Spread each bun with 1-2 tablespoons whipped feta. Place a cooked patty over half of the buns. Top them with cucumbers, caramelized onion, and the remaining buns. Serve and enjoy!