Salting a recipe, whether spaghetti sauce, minestrone soup, brown gravy or anything else, is a precise step. Too much can overpower the other flavors and, in extreme cases, render the dish inedible. But a resourceful chef can resolve the problem without the need to throw out the dish or start from scratch.
Balance out the salt flavor with a squeeze of lemon juice or a dash of honey.
Peel a potato and cut it into large pieces and add them to the over-salted dish to soak up the salt. Simmer for 15 minutes, then remove the potato pieces.
Add more of the other ingredients from the recipe to counter the salt. This may cause you to make more than you intended, but can save the recipe and give you leftovers for your next meal.