Working all week and limited hours to cook leads me to cook once a week for weekly meals and our lunch menus. I also buy a couple premade meals from Trader Joe's. And yes, I do read the ingredients.
Since I had roast beef slices and quite a few cremini mushrooms I made a sauce to pour over rice.
Roast Beef with Mushroom Sauce
In large open pan add 1 1/2 Tablespoons olive oil. Heat just a bit and add 1/4 diced red onions (or what ever onion you have).
Sautee for a few minutes than add 5-6 washed and sliced cremini mushrooms. Saute for 5 minutes until they soften.
Add juice from roast. Heat until almost bubbly. Add 1/4 C half and half or what ever dairy you have.
Stir and cook on low heat for 3 minutes.
In a small bowl add 2 Tablespoons half and half and 1 Tablespoon corn starch or flour. Whisk to get all the lumps out. Add to mixture.
Once it thickens add slices of roast beef on top and cover.
Serve over rice.