To soak the toast
Mix the eggs, milk, sugar, cinnamon and salt in a shallow dish.
Cut the slices of toast into quarters, place them in the egg and milk mixture, allow to soak for approx. 5 mins. Turn the toast over and leave to soak for a further 5 mins. Cut the apple into thin slices.
Rub the butter and sugar by hand to form a crumbly mixture. Grease 8 holes in the muffin tin. Place 5 slices of toast and 2-3 apple slices in each hole, top with butter.
Approx. 30 mins. in the lower half of an oven preheated to 200°C.