1. Grease a 6-hole muffin pan with the melted butter. Brush the bread slices with the remaining butter. Remove the crusts and press slices into the muffin holes to form cups.
2. Break the eggs into the bread cups, 1 egg per cup. Top with a sprinkle of bacon, cheese and spring onion. Season to taste.
3. Bake in a preheated oven at 180°C for 8 - 10 minutes or until cheese is melted and egg is cooked.
4. Allow bread cups to rest for 3 minutes in pan before removing. Serve warm.