Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
  3        tablespoons  pure olive oil -- divided
  2              large  onions -- halved and thinly
                        sliced
  1            package  sliced fresh mushrooms -- (8 ounce)
  1 1/2         pounds  top sirloin steak -- about 1-inch thick
                        salt and pepper

Preparation:

Heat 2 tablespoons oil in a large skillet over medium-high heat. Add onions and cook, stirring frequently, until soft and golden, about 5 minutes. Add mushrooms and cook until soft, about 3 minutes. Remove to a plate and cover with foil. Cut steak into 4 pieces. Add remaining oil to skillet. Cook the steaks about 3 minutes per side for medium rare. To test, cut center of steak with the tip of a sharp knife. Place a steak on each dinner plate. Top with onions and mushrooms.

Nutritional Information:

232 Calories (kcal); 7g Total Fat; (28% calories from fat); 35g Protein; 5g Carbohydrate; 99mg Cholesterol; 96mg Sodium