The orignal for this recipe came from the Burger Cookbook, a little paperback cookbook I purchased in the 1970's sometime and it has been loved to pieces. This is one of the favourites from that book with some slight modifications. In its original day, it would have been considered a budget stretcher with only the 1/2 lb of hamburger, now I consider it to be a heart friendly dish since I now use very lean beef and I modified a biscuit recipe for the topping to use oil instead of a saturated fat. You can tweak this by changing the veggies to your taste. Occasionally I will add some chopped mushrooms.