Grind half the peanuts finely, chop the rest coarsely. Beat 1 egg white, 1 pinch of salt and 1 tsp. lemon juice until stiff. While continuing to beat, add sugar. Keep beating until the sugar is completely dissolved. Fold in half each of the ground and chopped nuts
Place approx. 45 heaps on a baking tray covered with baking paper using 2 teaspoons. Bake in a preheated oven (electric cooker: 150 °C/circulating air: 125 °C/gas: level 1) for 20-25 minutes. Let them cool down
Make the same mixture again from the remaining egg white, lemon juice, salt, sugar and nuts and bake another 45 macaroons
Finely chop the dates and mix with the jam. Spread the flat side of half of the macaroons. Place 1 macaroon on each side. Dust with icing sugar and cinnamon