Prepare spaghetti in boiling salted water according to package instructions. Wash the peppers, cut into thin rings and remove the seeds. Wash and clean spring onion and cut it diagonally into slices. Peel and finely chop the onion. Heat 1 tablespoon of oil in a pan and fry the fish fingers until light brown.
Remove the fish fingers from the pan. Drain the noodles. Clean the pan and heat 1 tablespoon of oil. Sauté the pepper rings briefly and remove from the pan. Sauté the onion in the pan for about 2 minutes, then dust with flour and curry and pour on the stock and milk while stirring. Bring the sauce to the boil while stirring, simmer for 1-2 minutes and season with salt and pepper. Add half of the spring onion to the sauce. Grate cheese. Mix pasta and half of the cheese and put it into a greased pizza form (approx. 26 cm Ø), then pour the sauce over it.
Bring the sauce to the boil while stirring, simmer for 1-2 minutes and season with salt and pepper. Add half of the spring onion to the sauce. Grate cheese. Mix pasta and half of the cheese and put it into a greased pizza form (approx. 26 cm Ø), then pour the sauce over it. Cover the spaghetti pizza with paprika, fish sticks and the remaining leek and onion rings and sprinkle with cheese. Bake the pizza in the preheated oven (electric cooker: 200 °C/ convection oven 175 °C/ gas: stage 3) on the upper rack for approx. 10 minutes until the cheese is golden brown