Cut the beetroot into slices. Stir crème fraîche and pesto until smooth. Season to taste with salt and pepper. Unroll the pizza dough and put it on a baking tray with baking paper. Roll up a 2 cm edge all around and press on.
Spread the dough with the pesto cream.
Cover the dough with red prayer slices. Pluck the mozzarella over it and bake in the preheated oven (electric cooker: 225 °C/ convection oven: 200 °C/ gas: see manufacturer) for 10-15 minutes. Wash wild garlic, shake dry.
Pluck leaves from the stems and cut into strips. Remove the tart from the oven and sprinkle with wild garlic.