Easy Savoury Tart

This is a really easy savoury tart.  So easy that it comes out a recipe book for children! Yet again it is a basic recipe and you can feel free to experiment adding and removing ingredients according to your taste buds!
Ingredients:

• 3 slices white bread, cut into cubes
• 50ml Margarine
• 500ml milk
• 500ml cheddar cheese, grated
• 1 x 190g tin corned beef
• 1 onion, chopped
• Salt and pepper, to taste
• 4 eggs, beaten

Method:

1. Preheat oven to 180°C. Grease a 22cm pie dish.
2. Put bread cubes, margarine and milk in a pan, then bring to the boil.
3. Remove pan from heat and add cheese, corned beef, onion, salt and pepper and mustard powder.
4. Mix well, then add beaten eggs and mix again.
5. Spoon mixture into a greased pie dish and bake for 35-40 minutes.
6. Leave tart to cool slightly then cut into slices and serve.