What to do if spaghetti sauce is too thick?

- Add water or broth. This is the simplest solution, and it will also help to dilute the flavor of the sauce.

- Add crushed tomatoes. Crushed tomatoes will help to add liquid and texture to the sauce.

- Add a dairy product, such as milk or cream. This will help to make the sauce creamier and thinner.

- Simmer the sauce for longer. This will help to evaporate some of the liquid and thicken the sauce.

If the sauce is still too thick, you can try a combination of these methods. For example, you could add water or broth and then simmer the sauce for longer.