-shepards pie out of the roast/gravy w the carrots, add onions, peas whatever veg you want inside and mash the potatoes for on top
-slice the roast for tacos/fajitas(with sauteed onions,peppers, sour cream and salsa!)
-potatoes and carrots could be made into a indian curry, with a can of chickpeas and curry sauce
-roast beef into wraps/sandwiches for lunches
-potatoes can be turned into potato pancakes
-carrots into carrot soup
-roast in stirfry...just like you'd use steak or chicken
the soup thing would be SUPER easy...if you have leftover gravy you can water it down with beef broth, dice the potatoes,carrots, beef, add onions, garlic, your choices of spices and simmer
Im a vegetarian now,but I remember when I was young and lived w my grandma/grandpa she'd buy the biggest roast when it was on sale and make it with TONS of potatoes and carrots and would warp it into a million meals!...The shepards pie was always my fav since it tasted more like "home" then a ground beef shepards pie