Loosely, yet thoroughly, toss together all of the burger ingredients in a large bowl. Divide the mixture and shape into four patties. Set aside in refrigerator until ready to grill.
Set up grill for direct cooking over high heat; brush and oil grill before cooking. Place burgers on hot grill and cook for 4-5 minutes on each side for medium.
Serve hot on pita bread with baby greens, tomatoes, red onion slivers, pickled cucumbers, and a dollop of Lemony Feta Aïoli.
Recipe by Grilling Outdoor Recipes powered by Bull Outdoor Products at https://blog.bullbbq.com/lamb-and-olive-burgers-with-lemony-feta-aioli/