Meatballs al Forno

Ingredients 200 g/7 oz/ 2 cup vegan mince balls 50 g/1 1/4 oz /1/2 cup vegan Parmesan cheese, finely grated 1 tsp dried oregano 1 lemon, zest only 25 g/1 oz sun- dried tomatoes, chopped Salt and freshly ground black pepper 2 tbsp olive oil 1 onion, diced 2 garlic cloves, minced 1 tsp chilli