@williamx Different world, heck their world could be warmer overall and have less variation in the temperature than earth. Where they live herbs, spices and what not may be pretty well available especially if they don't have proper methods of preserving meat you will mask the taste of bad meat with spices, just like what occurred on earth. Though again different world.
Spaghetti is salt, pepper, tomato, meat, oregano,,oil, onion, garlic, oil, mushrooms and noodles? You can make noodles out of damn near anything. Zucchini noodles are pretty decent so long as they don't have too much moisture. You don't really need oregano or mushrooms for it to be spaghetti heck, not many people put mushrooms in cause of picky people. I've met those who don't put onion either while putting plenty of sugar in. While it tasted good, you'd get fat quick from that recipe though it is popular with kids. I do think it is one of the more possible modern dishes that they push in these isekai books. Making soy sauce and that which is related with soy beans is far harder and it is amazing how many teenagers know how how to make it... Surprised there is a crop like soy in so many worlds and has also been discovered by the people and mc so quick lol