Roast the flaked almonds in a pan without fat while turning them golden yellow. Peel the bananas and cut them in half lengthwise. Heat the fat in a frying pan and fry the fruit halves until golden brown all around.
Add currant jelly and bring to the boil briefly. Stir in 3 tablespoons of water. Season to taste with lemon juice. Arrange 2 banana halves on a dessert plate. Fill with fruit sauce and sprinkle with almonds.
Serve garnished with lemon balm.