Sirloin Strips and Rigatoni - Challenge Dairy

Ingredients

• 8 Tablespoons (1 stick) Challenge Butter, divided
• 1 pound of sirloin steak trimmed and cut into ¼-inch thick strips
• 8 ounces (2½ cups) mushrooms, sliced
• 1 cup chopped onions (1 large)
• 1 ½ teaspoons finely minced fresh garlic
• ¾ teaspoon finely minced fresh rosemary
• 1 teaspoon prepared spicy brown mustard
• 1½ Tablespoon flour
• 1 teaspoon salt
• ½ teaspoon black pepper
• ½ cup half-and-half or light cream
• 3 Tablespoons dry sherry
• ¼ cup chopped sundried tomatoes (dry packaged without oil)
• 1 pound dried rigatoni
• whole fresh basil sprigs or chopped fresh basil for garnish