In a large bowl, combine 1T olive oil, garlic, red onions, egg, salt, panko, cumin, oregano, pepper, cinnamon, mint, and parsley to a large bowl. Mix well. Add lamb and pork. Combine well. Spoon out and form meatballs (any size).
Set pressure cooker to "sear", add remaining oil, and press "start/stop". Add meatballs and brown on all sides.
Add white vinegar and water and close and lock lid. Set pressure cooker to "meat/stew", adjust time to 4 minutes, and press "start/stop".
When done, natural release for 10 minutes, then do a quick release to make sure all pressure is released before opening lid.
Carefully open lid and squeeze lemon juice over meatballs. Serve with feta cheese, tomatoes, olives, and tzatziki sauce for dipping.