Peel onion and garlic and dice them finely. Drain the peppers. Bring 3-4 l salt water (1 teaspoon salt per litre) to the boil. Roast the coriander and mustard seeds in a pot without fat until they start to smell.
Heat the oil in the pot. Sauté the onion and garlic until transparent. Steam roasted peppers for about 1 minute. Stir in tomato paste and sweat briefly. Add tomatoes and 1⁄4 l water. Simmer for about 15 minutes, stirring frequently.
Cook the pasta in boiling salted water according to the instructions on the packet until al dente. Clean and wash the spinach.
Remove the paprika and tomato sauce from the heat. Add spices and cream and puree with a hand blender. Season to taste with salt and pepper. Keep warm.
Drain the pasta, let it drain and put it back into the pot. Mix with sauce and spinach. Season if necessary. Slice the cheese thinly with a peeler and serve with it.