Start by making the poached plums, take sugar and water in a pan, bring it to a boil. Add in halved plums cut side down and let it simmer for 5 mins, flip over and let it simmer for another 5 mins. Now turn off the heat and set aside.
Take egg, cinnamon and milk in a bowl and mix well.
Take bread slices and dip them in the milk mix on both sides so it can absorb.
Heat butter in a pan, fry the bread slices till golden brown.