Cook the pasta in boiling salted water for 6-8 minutes until al dente. In the meantime, finely dice garlic and onion. Clean the spinach and cut off the thick stems. Wash the vegetables and drain well
Heat the oil in a pot. Sauté onion and garlic in it. Add canned tomatoes and chop them coarsely in the pot with a pan knife. Let it boil down for about 5 minutes at high heat. Season with salt, pepper and lemon juice. Chop the spinach coarsely and fold in
Pour the pasta into ovenproof, greased moulds. Add the prepared tomato mixture. Sprinkle with pine nuts and parmesan. Bake in the preheated oven (electric range: 225 ° C/ convection oven: 200 ° C/ gas: level 4) for approx. 5 minutes