Preheat the grill (broiler). Then in a bowl, mix the cabbage with the mashed potato, salt, and pepper.
Add half a tablespoon of butter and half a tablespoon of oil to each of two medium (20cm diameter) frying pans *Note 1
Heat the pans over a medium-high heat until the butter is melted and bubbling.
Add half of the bubble and squeak mixture to each pan and squash down using a spatula to completely cover the base of the pan.
Fry for 5-7 minutes until the edges start to brown then ruffle the top of the bubble and squeak using a fork (the more ruffled, the more crispy bits).
Melt the remaining 1 tbsp butter and mix with the remaining 1 tbsp oil, then brush the top of the bubble and squeak with the mixture.
Place under the grill and grill for 4-5 minutes until golden brown.
Remove from the oven and sprinkle with the chopped bacon, salt, and pepper. Top each with a poached egg or two and a sprinkling of fresh parsley.
Serve the bubble and squeak with brown sauce if you like.
