3-4cmfresh horseradishpeeled and freshly grated (or 1 tablespoon creamed horseradish)
200mlsour creamor creme fraiche or thick plain yoghurt
Preheat the oven to 200'C. Scrub the beetroot well but leave them whole. Place them in a roasting tin and scatter around the garlic, thyme and bay leaf. Trickle on the oil and season well with salt and pepper.
Mix everything together with your hands so that it is well coated. Pour a wine glass of water into the tin and cover tightly with foil. Roast until the beetroot are tender when pierced with a knife - about an hour depending on the size of the beetroot.
While the beetroot are roasting, make the horseradish cream: in a bowl mix the grated (or creamed) horseradish with the sour cream, creme fraiche or yoghurt.
Remove the foil from the roasting tin and leave the beetroot until they are cool enough to handle. Top and tail them and peel or rub off the skins - they should slip off easily. Roughly chop the beetroot.
Squeeze the soft garlic from the skins and place in a blender with the beetroot. Process with enough of the stock to make a smooth puree, then transfer to a saucepan and thin further with stock to get the texture you like.
Heat through, over a medium heat, till thoroughly hot but not boiling. Adjust the seasoning to taste. Serve the soup in warmed bowls with a dollop of the horseradish cream and the dill scattered on top.