Knead flour, water, olive oil and salt to a smooth dough. Cover with a wet cloth and let rest in a warm place for 20 minutes.
Preheat oven to 230°C.
Mix vegan crème fraîche with 1 tablespoon water, salt and pepper. Cut the smoked tofu into small cubes. Cut the cherry tomatoes in half. Cut spring onions into rings. Chop the chives into small pieces.
Roll out the dough as thinly as possible on a floured surface with a rolling pin. Then spread evenly with the crème fraîche. Spread the smoked tofu, cherry tomatoes and spring onions over the dough.
Bake in the oven for 12 – 15 minutes.
Spread the chives over the tarte flambée.