Beef Lo Mein with Thai Peanut Sauce

I took a shortcut tonight and used a bottled sauce. One I could have made from scratch, but I had bought it before I started making sauces from scratch and I decided I wanted to try and use it up. It was pretty tasty and it was fast to throw this dinner together.
-Amanda

Beef Lo Mein with Thai Peanut Sauce

8-10 oz sirlion beef
1 red bell pepper
2 handfuls of sugar snap peas
1/2 pint of button mushrooms
3-4 tbsp vegetable oil
1/4 cup peanuts
1/2 cup bottled Thai Peanut Sauce
Whole wheat spaghetti noodles

Prepare noodles according to package directions.
Slice beef into very thin strips going against the grain of the meat. Cut the bell pepper into thin strips too. Slice the mushrooms. In a large pan, add some of the vegetable oil and get it very hot. Add beef but do not try to stir it right away. Let it start to sear. Then after a minute or two, stir it and cook until almost cooked through, only about 4 minutes total. Remove meat from skillet. Drain any fat. Add a bit more vegetable oil and saute vegetables until cooked through. Add beef back in and peanut sauce. Cook until meat is done. Pour over noodles and top with some raw peanuts.