Fry the egg

• Melt the butter in a frying pan over medium heat.
• Fry the egg until the white is set and the yolk is still soft.

Melt the cheese

• Place the cheese slice on the fried egg and let it melt.

Assemble the sandwich

• Slice the glazed donut in half horizontally.
• Place the egg and melted cheese between the donut halves and serve immediately.