Wash lemon hot, rub dry. Grate the peel thinly. Halve the lemon and squeeze the juice. Boil up the juice in a small pot and stir in the tea powder. Cream fat, sugar, lemon peel and salt with the whisk of the hand mixer.
Stir in the eggs one by one. Mix flour, almonds and baking powder and alternately stir in lemon juice mixture. Colour the dough with some food colouring.
Line the troughs of a muffin tin (12 troughs) with baking cups. Spread the dough into the baking cups. Bake the muffins in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for 30-35 minutes.
Remove the muffins from the oven and let them cool on a cake rack. Roughly chop the chocolate and melt over a warm water bath. Use a spoon to decorate the muffins with strips of white chocolate.
Put cranberries on it.