Peel and wash the carrots. Chop all but one carrot into small pieces. Peel onion and garlic. Chop both finely.
Roast the nuts, take them out. Fry onion, garlic and carrots in hot oil. Deglaze with 1/2 l water. Bring to the boil and stir in the stock. Cover and cook for about 20 minutes.
Finely dice the rest of the carrot. Cook spaghetti in plenty of boiling salted water for 8-10 minutes until al dente
Mash carrots in the broth. Stir in the cream. Season sauce with salt, paprika and sugar. Add carrot cubes and cook for about 5 minutes
Wash the basil and cut into strips, except for a few leaves. Add with the nuts
Drain spaghetti well and serve with the carrot-basil sauce. Garnish with the remaining basil leaves