Prepare dressing by combining mayonnaise, mustard, garlic, lemon juice, vinegar, salt & pepper in a blender & process until smooth. With blender running on low speed, slowly pour olive oil in a steady stream just until fully incorporated. Place dressing in refrigerator until ready to use.
Cook pasta according to directions on package. Drain & then rinse the pasta under cold water until pasta is no longer warm. Drain thoroughly. Place pasta in a LARGE bowl. Sprinkle the pasta with the Italian seasoning. Toss.
To the bowl of pasta, add torn lettuce, croutons & parmesan cheese. Drizzle with prepared caesar dressing & toss lightly with salad tongs. Serve immediately.