Toss beef with mustard, garlic, and thyme in medium bowl.

Cook and stir beef mixture and mushrooms with margarine in large skillet over medium-high heat 4-5 minutes, or until beef is browned. Remove from skillet; set aside.

Add 1 ¼ cups water, milk, asparagus, pasta and Special Seasonings packet to same skillet; bring to a boil. Reduce heat to medium. Gently boil uncovered 4-5 minutes or until pasta is tender, stirring occasionally.

Stir beef mixture back into skillet; cook 1-2 minutes longer or until heated through.