Let the oats soak into 3 oz of tap water.
Dice the onion, the basil and mint leaves into very small pieces.
In your mixing bowl, knead the mince meat with your hands with fresh lemon juice from 1/2 lemon.
Add the soaked oats (if there is any water left, remove it first) and the rest of the igredients in the mince meat and knead with your hands until the mixture looks smooth.
Cut the feta cheese into small cubes.
Start preheating the oven to 150 degrees degrees C. Select the "upper and lower heat" setting.
Put a piece of cooking paper on the oven tray. Pinch off pieces of the mixture and flatten with your palms to make 12 small patties.
With your finger create a small hole at the center of each pattie and put the feta cheese cubes.
Roll each piece into a round meatball and make sure the cheese is covered.
Put the tray in the oven and set the temperature to 180 degrees C.
After 20 minutes carefully open the oven door, flip the meatballs and close the oven door as soon as possible.
After 15 minutes turn the heat off and open the oven door. Pour lemon juice from 1/2 lemon while the meatballs are still hot. You are ready to serve!