A good substitute for spaghetti are zucchini, cut into thin stripes with a potato peeler. As in bread, there are a few protein breads on the market, coop has packaged "Proteinbrot", Migros has fresh protein bread (blue paper wrap) and Aldi Germany has some, too, I think they call it "Eiweissbrot" .

These breads still contain sugar but in a very low dosage, and the carbs per slice are around 3 grams compared to 30 and more in normal bread.