Slice the Sirloin Tips into large cubes.

Preheat a pan over medium/high heat. Add the sirloin tips to the pan and brown. Unless you have a gigantic pan, I would do this in batches so that the meat browns evenly.

While you are browning the meat. Dice up the onions and garlic.

When the meat is fully browned add it to the crock pot along with the onions and garlic.

Slice the mushrooms and add them to the crock pot.

Add two cans of cream of mushroom soup, 1 bag of lipton onion soup mix and 2 cans of beef broth.

Cook for 8 hours on low.

In the last hour of cooking, mix two tablespoons of cornstarch into 1/4 cup of cold water. Then add it to the crock pot. This will thicken the sauce. If you wish to have a thinner sauce, you can skip this step.

Serve over mashed potatoes, rice or my favorite, egg noodles.