Soak tomatoes in hot water if necessary. Roast pine nuts without fat, remove.
Peel and finely dice the onions and garlic. Sauté half of the onions in 1 tsp. hot oil in a pot. Add frozen spinach and about 100 ml water. Steam covered for about 10 minutes. Season to taste.
Cook the pasta in plenty of boiling salted water for about 6 minutes until al dente.
Dab tomatoes dry and cut into strips. Sauté garlic and the rest of the onions in 1 tsp. hot oil until translucent. Sauté the tomatoes briefly. Stir in 300 ml water and stock. Bring to the boil and simmer for about 5 minutes.
Refine with crème légère. Season to taste with salt and pepper. Drain the pasta, mix with spinach and sauce. Sprinkle with seeds. Slice parmesan cheese over it. Garnish with basil.