Use some fried onions like above or you can use raw but they will be crunchier.
3-4 eggs depending on size of quiche dish
Splash of milk to make it more fluid
200-400g of cheese for in the mix and for the top
Sliced tomatoes for the top – optional.
Other fillings: smoked salmon and Boursin, cooked broccoli with blue cheese, cooked bacon or cooked ham chunks