Preheat oven to 450 degrees

Combine all chicken ingredients in a bowl and mix together well. Divide into 12 equal-sized pieces. Roll each piece into a ball and place on a greased baking tray

Bake for 15-17 minutes, until fully cooked

Meanwhile, melt margarine in a small pan. Add sliced onion and cook until starting to soften, about 5-7 minutes

Add garlic and cook for another minute, until fragrant. Add the sugar, broth and salt/pepper, stirring to melt the sugar. Bring to a slight boil and simmer until thickened

Once meatballs are cooked, remove from the oven and add to the pan with the sauce, tossing to coat

Top with the cheese and broil until cheese is melted