Bring 3-4 l salted water (1 teaspoon salt per litre) to the boil. Clean, wash and cut the fennel into strips, chop the green. Peel and slice onions. Pears wash, quarter, core, cut in columns.
Cook the pasta according to the instructions on the packet. Steam onion and fennel in 2 tbsp. oil for about 7 minutes, add pears and steam briefly. Season with salt, pepper and sugar. Pour on wine, bring to the boil. Dice cheese and melt in it.
Pluck the bread and fry in 2 tablespoons of oil. Drain noodles and mix with the sauce. Sprinkle with fennel greens and croutons.