The key to ensuring your lasagna heats through is to cook it at the correct oven temperature, which is around 400 degrees Fahrenheit, according to married chefs Angie Rito and Scott Tacinelli ...
Roast for about 20–25 minutes until golden and soft. Set aside. Reduce the oven temperature to 200C/180C Fan/Gas 6. Heat the remaining oil in a deep frying pan over a high heat. Add the onions ...