Heat 1 tablespoon olive oil in a saucepan over a low heat.
Add the minced garlic, followed by the grated onion and let them soften for 1-2 minutes.
Add in the chopped parsley and thyme leaves. Stir for another 1-2 minutes.
Add in the grated apple, and finely chopped celery. Stir everything and cook for about 3 minutes. Remove from the pan when golden.
Preheat the oven to 180°C (350°F) fan setting. Grease an oven tray with oil spray.
Take 1.5 slices wholemeal bread. Toast them a little and cut off the crusts. Place in a small mixer and blend until you get a fine, soft breadcrumb mixture. Empty into a large mixing bowl.
Add in the cooked apple, celery, onion, garlic and herb mixture. Add the minced or ground chicken breasts.
Lightly beat 1 egg and add this in as well.
Mix with your hands until well combined.
Form the mixture into a batch of mini meatballs about 2-3 cm diameter by squeezing and rolling in your hand. An ice cream scoop can also be very useful too for scooping out the mixture.
Place 100 grams plain flour on a plate or shallow bowl.
Roll each meatball in the flour until coated. Shake off any excess.
Place on the oven tray and drizzle 1 tablespoon oil over the meatballs.
Bake for 20 minutes or until the tops are golden, turning them over halfway through. Serve with your favourite sides, pasta, rice and veggies.