Wash and slice the kumquats. Melt 2 tablespoons of sugar in a pan. Add liqueur and lemon juice, bring to the boil and dissolve sugar. Add the kumquats and turn them in. Mix quark and 80 g sugar.
Whip the cream until stiff. Add cream and kumquats to the quark and fold in. Roast the almonds in a pan without fat, take them out. Separate the eggs. Beat egg whites until stiff. Cream fat, 40 g sugar and salt with the whisk of the hand mixer.
Stir in the egg yolks one after the other. Mix flour, almonds and baking powder and stir in orange juice alternately. Fold in the beaten egg white. Heat waffle iron and grease lightly. Bake 8 waffles from the dough one after the other.
Cut waffles into individual hearts. Fill 2 hearts each with the cream. Arrange on a plate and dust with icing sugar.