Beat the egg whites until very stiff, adding the lemon juice. Add the sugar while stirring. Remove 3 tablespoons of the foam and set aside. Add the almonds and 1 tablespoon of jam to the rest of the mixture. Pour the dough into a piping bag with a perforated spout and squirt onto two baking trays lined with baking paper approx. 6 cm long strips.
Using the perforated spout, squirt 2 dots of the remaining foam onto each strip. Pour some jam into each of these spots. Bake the macaroons on the baking trays in a preheated oven (electric: 175 °C/ gas: level 2) for 15-20 minutes one after the other. Let them cool down and dust with icing sugar