Wash the fillet, dab dry and cut into 12 equal pieces. Halve the bacon crosswise. Cut open the freezer bag, place the fillet slices in between and (using a cake roll or a saucepan) beat 2-3 mm thin.
Season with salt and pepper. Place 1 plum on each slice of meat, roll up and wrap tightly with 1/2 slice of bacon. If necessary, pin with small skewers.
Clean, wash and cut the spring onions into rings. Heat the oil in a pan and fry the rolls for 5-6 minutes. Season with salt and pepper and remove from the pan. Sauté the spring onions briefly in hot frying fat.
Add the chopped tomatoes and bring to the boil while stirring. Season with salt, pepper, sugar and sherry. Warm the rolls briefly in the tomato sauce. Baguette tastes good with it.