Place the paper baking cups in the recesses of a muffin tray (12 recesses) and preheat the oven (electric oven: 175 °C/circulating air: 150 °C/gas: see manufacturer). Dab beetroot dry and dice.
Puree finely with a hand blender and add oil. Stir in 3 eggs individually with the whisks of the mixer. Mix flour, baking powder, cocoa, 200 g sugar, vanilla sugar and 1 pinch of salt. Add beetroot mixture and stir everything together briefly.
Spread the dough into the moulds. Bake in a hot oven for 20-25 minutes. Remove the muffins and let them rest in the pan for about 10 minutes. Then lift them out of the cups and let them cool down.
Switch the oven temperature down to 100 °C (circulating air: 75 °C/gas: see manufacturer). Line a tray with baking paper. Beat the egg whites until stiff, adding 70 g sugar. Continue beating until the sugar has dissolved.
Stir in lemon juice briefly. Colour pink with a few drops of food colouring.
Pour meringue into a piping bag and squirt 12 small tuffs onto the baking tray. Leave to dry in the hot oven on the lowest shelf for about 1 hour. Then leave to dry for about 30 minutes in a switched off oven.
Leave the oven door open a little, if necessary. Warm the jelly. Place 1 meringue dot on 1 muffin with 1 small blob of jelly.