Wash beetroot thoroughly and wrap in aluminium foil. Bake in the preheated oven (electric: 200 °C/ gas: level 3) for about 1 1/2 hours. Wash the herbs, dab dry (put some parsley aside for garnishing) and chop finely.
Peel and finely chop the onion. Mix quark, yoghurt, herbs and diced onion. Season with salt, pepper and Tabasco. Cut the beetroot open and arrange on plates with the herb quark.
Garnish with parsley and pepperoni. Serve with whole grain toast.