Cook the pasta in plenty of boiling salted water for about 8 minutes until al dente. Drain, let it drain and put it into an oven
Cut spring onions into coarse rings. Wash the fish, dab dry and sprinkle with lemon juice. Season with salt and pepper
Heat the oil in a coated pan. Fry the lemon slices and fish on both sides. Remove and put aside. Sauté spring onions in frying oil. Deglaze with white wine and cream and bring to the boil. Stir starch into 2 tablespoons of water until smooth. Thicken the sauce with it. Bring to the boil and season with salt and pepper
Cut the tomatoes into slices. Add the fish and lemon slices to the pasta. Pour the sauce over the pasta and bake in the preheated oven (electric cooker: 225 ° C/ convection oven: 200 ° C/ gas: level 4) for about 10 minutes. Serve garnished with basil