Save the meat and veg, ditch the sauce, ( you'll never be happy with it) and make a standard gravy instead.Serve with some mashed potatoes. It may not be the most exciting meal but at least you won't have wasted the lot. Or, freeze the meat/veg for another time. Add it to the next stew you make or make a pie with it. Lots of choices once you've saved it. Good luck, we've all been there!
Life is like good wine.......best taken with friends x