Beef Stew..........................…

Of course you can use leftover beef... but the real question here is Should you use it? it is leftover from Sunday and today is Friday you will have to cook it again for hours on the stove along with the vegetables, most of the goodness is already out of it it won't even give your stew any flavor it will be off- flavor at best as it is not fresh it has stayed too long to be re -used... in my opinion any meat after being cooked and refrigerated more than 3 days should be thrown away