It might be spoiled, so I wouldn't try it. The old saying is, "When in doubt, throw it out". That said, none of the components in that dish are especialy prone to spoilage (as is shellfish for instance). It depends also on the temperatures the meal was exposed to.
Some good websites to find recipes for homemade spaghetti sauce are Allrecipes, The Happy Housewife, Taste of Home Recipes, and Recipe. You can also find homemade spaghetti recipes at wikiHow.
Spaghetti sauce will boil at a temperature a bit of that of boiling water. The different things in spaghetti sauce will change its boiling point, and the amounts of these different things affect it as well.
Well it dipends what you store it in, and where you store it.
Add more of every other ingredient
Yes, you shouldn't have any problem with this. I don't think I'd do it if the spaghetti sauce was made with clams or poultry but if it's vegetarian or beef-based, you should be fine.
Some creative recipes using a can of tomato sauce include homemade pizza sauce, spaghetti sauce, chili, tomato soup, and shakshuka.
which sauce is better with thin spaghetti? Vodka sauce or four cheese spaghetti sauce
No. The sausage will only partially cook, and therefore would be dangerous to eat. For maximum flavour you should fry the sausages until they are almost done, and them add them to the sauce
No. It is not worth the risk.
Some creative recipes using a small can of tomato sauce include homemade pizza sauce, tomato basil soup, spaghetti sauce, shakshuka, and enchilada sauce.
The traditional Italian recipe for spaghetti sauce, also known as sugo or rag, typically includes ingredients like tomatoes, onions, garlic, olive oil, herbs, and sometimes meat like ground beef or sausage. Marinara sauce is a specific type of tomato-based sauce that is often used in Italian cuisine, but it is not the only type of sauce used for spaghetti.
Some creative recipes using tomato sauce in a can include homemade pizza, spaghetti and meatballs, lasagna, chili, and shakshuka.