Preheat oven (electric cooker: 220 °C/circulating air: 200 °C/gas: see manufacturer). Mix crème fraîche, lemon peel and 1 tsp. chilli. Season to taste with salt. Unroll the dough together with the baking paper on a baking tray. Fold in about 1 cm of the rim all around. Spread the chilli-crème-fraîche on the dough and cover with slices of bacon. Bake on the second rack from the bottom for about 20 minutes until crispy.
Meanwhile clean and wash the kale, pluck the leaves into pieces and blanch in boiling salted water for about 2 minutes. Drain, rinse with cold water and pat dry well. Mix the kale with oil and a little salt. After about 10 minutes baking time spread on the tarte flambée. Bake ready.
Finely slice the cheese with a peeler. Remove the tarte flambée from the oven and sprinkle with cheese.