Preheat oven to 200 degrees celsius (fan-forced). Grease a 24 hole mini muffin tin with olive oil spray and set aside (if you don't have a mini muffin tray you can use a flat baking tray).
Place the mince, breadcrumbs, garlic, egg, oregano, salt and pepper into a bowl and mix until well combined. If using a Thermomix, mix on Reverse Speed 5 for 20 seconds or until well combined (using the spatula to help mix).
Roll into balls and place into the prepared tin (one meatball in each mini muffin hole).
Cook for 15 minutes or until cooked through.
Meanwhile, place the San Remo microwave couscous in the microwave for 60 seconds.
To serve, place the pita breads onto 4 serving plates. Top with the couscous, red onion, cherry tomatoes, cucumber, meatballs, feta and tzatziki dip.
It's not essential to use a mini muffin tin to cook the meatballs but it's a handy way to keep them separated and in shape.