Drain the bacon in a pan without fat (not too crisp). Cut beetroot into slices. Mix oil and beetroot and season with a little salt. Season sour cream with salt and pepper.
Place the dough with baking paper on a baking tray and cut in half. Wrap the corners a little bit. Spread the dough halves evenly with sour cream, then cover the corners with beetroot and bacon. Bake the pizza on the middle shelf of the preheated oven (electric cooker: 225 °C/ convection oven: 200 °C/ gas mark 4) for 10-15 minutes.
In the meantime, wash the thyme, dab dry and remove the leaves. Remove the pizza from the oven, sprinkle with thyme and coarse pepper and serve immediately.