Heat the oil in a pan over medium-high heat, add the bacon slice, and cook for about 5 minutes until crispy, then tear into small pieces and set aside.
Place the perforated toast in the same pan with the bacon fat, crack the egg into the hole, and scatter the bacon pieces over the egg while the egg is still liquid.
Fry for about 2 minutes on the first side, then flip and fry for 1-2 minutes on the second side until the toast is golden brown.