Preheat oven (electric cooker: 225 °C/circulating air: 200 °C/gas: see manufacturer). Cut red beetroot into slices. Mix crème fraîche and pesto. Season to taste with salt and pepper. Unroll the pizza dough and place on a baking tray with the paper.
Roll up 1-2 cm of edge all around and press down. Spread the dough with pesto cream.
Cover the dough with beetroot slices. Pluck the mozzarella into pieces and spread over it. Bake in a hot oven for 12-15 minutes.
Wash the wild garlic, shake dry and cut the leaves into strips. Remove the tart and sprinkle with wild garlic.