Step 1 Preheat the oven to 200 °C/ 400 °F (conventional), or 180 °C/ 355 °F (fan assisted). Cut the bacon into 2-inch (5 cm) pieces and arrange on a parchment lined baking sheet. Bake for 15 minutes until crisp, ant then remove from the oven. You can use the bacon grease for greasing the pan in the next step.