Awesome Steak Fajitas

I made amazing beef fajitas last night for my husband and kids. Wanted to share the recipe. I added a few extra bell peppers for more color and veggies, the beef was so tasty the kids didn't even mind!

Recipe:

Ingredients

1 lb. flank steak

2 tbsp. vegetable oil

2-3 bell peppers

1 onion

Marinade: