Asparagus Beef Stir-Fry

1 pound beef tenderloin, cubed
1 green onion, sliced
2 garlic cloves, minced
1/2 teaspoon salt
1/4 teaspoon pepper
1 tablespoon vegetable oil
1 pound fresh asparagus, trimmed and cut into 2-inch pieces
1/2 pound sliced fresh mushrooms
1/4 cup butter, cubed
1 tablespoon soy sauce
1-1/2 teaspoons lemon juice
Hot cooked rice

In a wok or large skillet, stir-fry the beef, onion, garlic, salt and pepper in oil for 3-5 minutes; remove and keep warm.

In the same pan, stir-fry the asparagus and mushrooms in butter until asparagus is tender. Return beef mixture to the pan. Stir in soy sauce and lemon juice; heat through. Serve with rice. Makes 4 servings.