- Preheat oven to 450 degrees F. 
- Line three baking sheets with parchment paper.  Place a cooling rack on top of one of the baking sheets covered in parchment for the meatballs to drain and brush liberally with olive oil.  Set aside. 
- In a large bowl, mix lean ground beef, pita cracker crumbs, beaten egg, finely crumbled feta (I use a mini food processor for the cheese and pita crumbs), minced garlic, 1/2 of the lemon juice (juice of 1/2 a lemon), 1/2 of the lemon zest, fresh oregano finely chopped, 3 tbsp olive oil, 2 tbsp finely minced red onion, 1 tsp salt and 1 tsp pepper.   
- Mix well, using your hands to thoroughly combine.   
- Form meatballs into 24, evenly sized, balls.  They should be about the size of a golf ball or slightly larger.  I use a small scoop for this. 
- Place meatballs onto the baking sheet with rack (or just place them directly on the parchment-lined pan), and set aside while you prep the vegetables. 
- In another large bowl, combine chopped vegetables, Greek seasoning blend, remaining lemon juice and zest (of 1/2 the lemon), 1/4 cup olive oil, olives, tomatoes and remaining 1 tsp of salt and 1 tsp pepper.  Toss to blend. 
- Spread vegetables onto the remaining two baking sheets. 
- Bake meatballs and vegetables for 18-22 minutes.  I start checking at 18 minutes and pull them when the meatballs are 165 degrees F.