Place the onions in a food processor and process for 10-15 seconds. Set aside.
In a large bowl, add the lamb, beef, garlic, processed onions, and sesasonings.
Add all ingrediets to food processor and process til smooth. Stop the processor as needed to scrape down sides of bowl.
Once everything is all blended together, place the meat mince into a loaf pan and shape into a meatloaf.
Bake for 1 hour and 15 minutes. Remove from the oven and drain off any fat. Slice and serve on pita bread with tzatziki sauce, chopped onion, tomatoes and feta cheese.