Trader Joes Beef Stroganoff

They had this as a sample the other day, so I made it that night for dinner. It was yum!

1 package Quick Cook Beef Sirloin (this meat is good stuff!)
1/2 Bag TJ's Chopped Onions (I only use dry and very little since we don't like onions)
1 package TJ's sliced mushrooms
2 packages TJ's Garlic Linguini
1 Tub TJ's sour cream
Salt and Pepper to taste

Cook noodles according to directions on packages. Drain. Saute onions in butter until brown (unless you're using dry onions and then you can just add them to the meat while it's cooking). Add beef to a frying pan and cook until it is almost completely cooked. Add mushrooms and cook until tender and meat is completely cooked. Don't drain meat. The juices will mix with the sour cream to make a delicious sauce. Toss cooked noodles with beef mixture. Gently fold in sour cream and season to taste with salt and pepper.