Sauteed Sirloin Tips

serves six

• 4 tablespoons (1/2-stick) butter, divided
• 1 large onion, sliced
• 4 cloves garlic, minced, divided
• 1 (8-ounce) package sliced fresh mushrooms
• 1 large zucchini, cut into 1/2-inch chunks
• 1 1/2 pound boneless beef top sirloin steak, cut into thin strips
• 1/4 teaspoon salt
• 1/2 teaspoon black pepper
• 1 tablespoon chopped fresh parsley
• 2 tablespoons dry sherry (optional)

1. In a large skillet, melt 2 tablespoons butter over medium heat. 
2. Add the onion and half the minced garlic; cook for 5 to 6 minutes, or until the onion is tender.
3.  Add the mushrooms and zucchini and cook for 5 minutes, or until tender, stirring constantly. 
4. Remove the vegetable mixture from the skillet and set aside.
5.  Season the steak with the salt and pepper. 
6. Add the remaining 2 tablespoons butter to the skillet and melt over medium-high heat. 
7. Add the steak, the remaining garlic, and parsley; cook for 5 minutes, or to desired doneness, stirring constantly.
8.  Return the vegetable mixture to the skillet and stir in the sherry, if desired. 
9. Cook until heated through, stirring constantly.