Preheat oven to 210 c
Stick the onion, black olives and garlic in the food processor and whizz them 'round to chop. Add in your herbs, salt and pepper and eggs.
Pour all this into a big bowl and mix it up with the minced meat until well combined.
This is where things get fiddly. Cut your cherry tomatoes in half and scrap out using your thumb or finger nails the inside bit. Don't waste that bit - just stick the seeds and insides in with the minced meat filling.
Cut the feta into tiny pieces and stick an itty bitty block inside each cherry tomato half.
Spoon (or scoop with your hands - whatever!) the meat mixture into silicone muffin cups. Now, I had these small (probably for little biscuits or chocolates) ones and some heart shaped ones, I used both. The small ones I scooped the meat into and then pressed the cherry tomato halves on top. In the heart shaped ones, which were bigger, I put the cherry tomato halves in halfway and then covered them with meat.
Cook for about half an hour in the oven. Your time might vary - my oven is a bit... unpredictable.