Boil macaroni pasta according to packet instructions. Drain and set aside.

In a small pot over a medium heat, add salted butter. When the butter has melted, add the plain flour. Mix well and cook for 30-40 seconds or until cooked out a little.

Slowly add the milk, whisking thoroughly. Add the cheddar cheese and mozzarella cheese. Add the salt and black pepper. Simmer for 3-4 minutes, whisking thoroughly until the cheese sauce is thick and smooth.

Add the cooked macaroni pasta to the cheese sauce. Mix well and set aside to cool slightly.

Heat the oven to 200c/Gas Mark 6. Arrange the savoury pastry pie crusts on a baking tray. Top each pie crust generously with macaroni cheese. Top with a little extra grated cheese and place in the oven. Bake for 10-12 minutes or until the macaroni cheese is bubbling and hot and the pie crusts are golden.

Arrange the macaroni pies on a serving plate and serve with tomato ketchup.