Bring A Large Pot Of Lightly Salted Water To A Boil. Add Linguini Pasta, And Cook For 8 To 10 Minutes, Or Until Al Dente; Drain. Meanwhile, Place Chicken And Cajun Seasoning In A Bowl, And Toss To Coat. In A Large Skillet Over Medium Heat, Saute Chicken In Butter Until No Longer Pink And Juices Run Clear, About 5 To 7 Minutes. Add Green And Red Bell Peppers, Sliced Mushrooms And Green Onions; Cook For 2 To 3 Minutes. Reduce Heat, And Stir In Heavy Cream. Season The Sauce With Basil, Lemon Pepper, Salt, Garlic Powder And Ground Black Pepper, And Heat Through. In A Large Bowl, Toss Linguini With Sauce. Sprinkle With Grated Parmesan Cheese.