Finely chop the onion and add to the minced meat. Salt, pepper to taste. We form cutlets, which we fry for 1 minute. both sides in a hot skillet. We spread it in a heat-resistant dish, and set to bake in the oven at 180 ° C until cooked.
Prepare the sauce: fry the onion in butter. Add sugar, then tomato paste. Dilute with water, squeeze the garlic and simmer for 5 minutes. on medium fire.
Dry the bread in the oven. Cut the onion into half rings, marinate in lemon juice with sugar.
Now we assemble the sandwich: we grease the lower piece of bread with the prepared sauce, put pickled onion and cucumber sliced \u200b\u200bin rings on it, then a lettuce leaf, maasdam cheese, a cutlet and tomato slices. Brush the top slice of bread with cream cheese and cover the sandwich.