Peel onion and garlic. Chop the onion finely, chop the garlic. Sort the spinach, wash and drain. Wash the chilli, cut lengthwise and remove the seeds. Chop the chilli finely.
Cook the pasta according to the instructions on the packet in plenty of boiling salted water. Add spinach 1-2 minutes before the end of cooking time, cook until done.
Heat 40 g fat in a pot, fry onions and garlic in it. Add flour and sauté briefly while stirring. Add stock and milk while stirring. Stir in mascarpone, bring to the boil and simmer for about 5 minutes.
Melt 25 g fat in a pan. Fry the breadcrumbs in it while stirring until golden brown. Stir in chilli and paprika, remove breadcrumbs from the pan.
Pour the noodles and spinach onto a sieve, collecting some cooking water. Drain the noodles. Stir lemon zest into the sauce, season with salt, pepper and lemon juice. Fold the noodles into the sauce, heat up briefly, adding some pasta cooking water if necessary.
Arrange in bowls and sprinkle with chilli crumbs.