Bring 4 qts water to a boil in a large saucepan. Add pasta and cook 7 minutes. Add shrimp to pan, cook 3 minutes or until shrimp are done and pasta is al dente. Drain, keep warm.

While pasta cooks, heat a small nonstick skillet on medium heat. Add nuts to pan and cook 2 minutes or til golden brown.

Combine 1/2 cup milk and flour in a saucepan, whisking until well blended. Place pan on medium heat and gradually stir in remaining milk. Stir in mustard and nutmeg. Bring to a boil then reduce heat to medium- low, and cook 5 minutes or until mixture begins to thicken; stirring constantly. Stir in S&P; cook 1 minute. Add pasta and shrimp, cheese and chopped basil, tossing gently to combine. Sprinkle with nuts and torn basil.