Wash the cauliflower, remove the stem and the middle part and keep the tops. Peel the potatoes. Blend the cauliflower and potatoes and cook the puree obtained in the steam oven for 15 minutes (if you do not have the steam oven cook it in a pan for ten minutes). Quickly cool the cauliflower and potato mixture in the Freddy with the function of blast chilling.
In the meantime, cut the turnip tops into pieces and sauté in a pan with a little olive oil, 1 clove of garlic, salt, pepper and a pinch of chili pepper. Cut the mushrooms into thin slices and quickly toast the almonds in a pan for a few seconds. Remove the pureed vegetables from the blast chiller, add a pinch of salt, pepper, eggs and grated gruyere and mix well. With the help of a pastry ring of about 10 cm in diameter, form discs 1 cm thick with the puree of vegetables (form them directly over the baking tray covered with parchment paper) and bake them in the preheated oven to 200°C for 30 minutes (until they become crisp).
Decorate the discs with turnips, a few tufts of goat cheese, a few slices of mushrooms and toasted almonds and bake for another 5 minutes. Serve the pizzas warm.