Prepare the pasta in boiling salted water according to the instructions on the packet. Drain, quench and drain well. In the meantime peel and finely dice the onion. Peel garlic and chop finely
Heat the oil in a pot and sauté the onion and garlic. Add tomato paste, sweat slightly and deglaze with tomatoes. Bring to the boil. Season to taste with salt, pepper, paprika and sugar. Let simmer for about 5 minutes
For the filling, mix lemon zest, ricotta, egg and 25 g Parmesan cheese. Season to taste with salt and pepper. Wash 3 stems of basil, shake dry, pluck leaves from the stems and chop finely. Stir into the ricotta cream
Pour the sauce into an ovenproof dish. Fill the pasta with the ricotta cream and put it in. Sprinkle with the remaining Parmesan cheese. Bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: see manufacturer) for approx. 20 minutes
Wash the remaining basil, shake dry. Pluck the leaves from the stems and chop them. Take the pasta out of the oven and serve sprinkled with basil