Step 2: Into an ovenproof pan, heat the olive oil over medium heat. Add the chicken and cook for 1-2 minutes on each side or until it's golden brown. Remove chicken from the pan and set it aside.
Step 3: Add into the pan the garlic and onion and cook this for 2-3 minutes or until the onion is soft. Stir in the Piccoli pasta and chicken stock reducing the heat and bringing to a simmer. Add oregano and stir through the Piccoli pasta then place your cooked chicken thighs on top. Cover with a lid and bake in the oven for 10 minutes.
Step 4: Remove the lid and add over the top of your chicken the grated mozzarella. Return this back to the oven without the lid and bake for another 10 minutes or until the cheese is nicely melted and golden.