Simple Fajitas with Mashed Potatoes

We call this dish Fajitas, although I do it a little differently than restaurants do.   My husband recently added the mashed potatoes to the recipe and it turned out tasty and very filling.

1 beef roast
1 onion
1 package portabella mushroom fillets
1 bell pepper
mashed potatoes

Cut the onion in slices, the mushrooms in small chunks, and the pepper in slices.  Put in a cast iron pan with a little lard, bacon grease or butter and sautee.  Stir fry till browned.

Cut the roast in bite sized chunks.  Put in cast iron wok with a little lard or bacon grease.  Stir fry till browned, then cover on high heat till tender.

Put on butter fried tortilla with mashed potatoes, sour cream, guacamole, avocado, and shredded cheddar cheese.