Soak bread in cold water. Peel and finely chop the onions. Peel garlic and chop finely. Wash herbs, dab dry and chop except for something to garnish. Squeeze the slices of bread well and knead them together with the minced meat, eggs, onions, garlic, herbs, a little salt, pepper and paprika powder. Grease a fat pan of the oven (approx. 32 x 36 cm) and press the mince evenly onto the bottom.
Pre-bake in the preheated oven (electric cooker: 225 °C/ circulating air: 200 °C/ gas: level 4) for approx. 15 minutes. In the meantime, peel the vegetable onion and cut into rings. Clean, wash and dice the peppers. Wash the beef tomatoes, dab dry and cut into slices. Drain mushrooms and cut in half. Heat 3 tablespoons of oil in a pan and fry the onions first. Add the peppers, also fry for 4-5 minutes and season with salt and pepper. Mix in the mushrooms. Mix gypsy sauce, ketchup, crème fraîche and 3 tablespoons of oil. Remove the pre-baked minced meat loaf from the oven and cover with tomato slices. Spread the vegetables first, then the sauce on top and sprinkle with cheese.
Heat 3 tablespoons of oil in a pan and fry the onions first. Add the peppers, also fry for 4-5 minutes and season with salt and pepper. Mix in the mushrooms. Mix gypsy sauce, ketchup, crème fraîche and 3 tablespoons of oil. Remove the pre-baked minced meat loaf from the oven and cover with tomato slices. Spread the vegetables first, then the sauce on top and sprinkle with cheese. Bake in the preheated oven, 2nd rail from below (electric oven: 175-200 °C/ convection oven: 150-175 °C/ gas: level 2-3) for about 1 hour. Cut the Mafia cake into approx. 20 pieces, sprinkle with chopped olives as desired and garnish with basil