1. Cook pasta according to package directions, omitting salt and fat. During the last 3 minutes of cooking, add asparagus and bell pepper to pan; drain.
2. Combine milk and spinach dip in a medium saucepan over medium heat; bring to a simmer. Reduce heat, and cook 5 minutes or until slightly thickened. Combine pasta mixture, spinach mixture, salt, and tomatoes in a large bowl; toss to coat. Sprinkle with basil, pine nuts, and cheese.