½cupyellow onionchopped; (or 1 cup of sliced onions)
1cupsliced mushrooms (optional)
2cupsbeef broth
1pkg.Lipton's beefy onion soup mix
2tablespoonsground dry yellow mustard
¾cupsour cream
2 tablespoonscorn starch
½cupwater
white vinegar (optional)
1lb.egg noodles
salt to taste
black pepper to taste
Instructions
Slice sirloin into thin strips against the grain; lightly season with salt and pepper
2 lbs. sirloin
In a large skillet and on medium heat, heat oil and add beef strips; cook till the meat is lightly browned and transfer to a plate. (You may have to do this in two batches)
2 tablespoons olive oil
Add sliced onions and mushrooms to the same pan you browned the meat; saute 5 minutes or until onions are translucent
½ cup yellow onion, 1 cup sliced mushrooms (optional)
Add beef broth, onion soup mix and ground mustard to pan; combine well, then add sour cream; mix that in real good
If you want a thicker sauce, do this: In a separate cup, mix warm water and corn starch together till smooth; pour this into the skillet; turn the heat up to medium high to activate the cornstarch slurry; then reduce the heat to low
½ cup water, 2 tablespoons corn starch
Add browned beef strips to pan; combine and cook on low until beef is tender (about 20-25 minutes on medium heat, covered); taste for seasonings. If you want it tangier, add white vinegar
white vinegar (optional)
Serve over prepared egg noodles; salt and pepper to taste
1 lb. egg noodles, salt to taste, black pepper to taste
Notes
Sliced mushrooms give this dish another level of savory flavor! Saute mushrooms and onions together, then continue recipe as directed.If you want a more tangy sauce, add a little white vinegar at the end