Cook pasta according to package directions, just until al dente. Drain, and set aside.
Slice chicken breasts into strips, and season with Cajun seasoning. In a large, deep skillet over medium high heat, melt butter, then add chicken and cook for 5 minutes.
Add mushrooms, red peppers, green peppers and green onions. Cook for 3 minutes, stirring often.
Blend in cream, lemon pepper seasoning and all spices. Bring to a boil. Reduce heat and simmer for 20 minutes, or until sauce thickens, stir occasionally.
Add cooked pasta and parmesan cheese. Stir to blend. Garnish with fresh chopped parsley and serve immediately. Refrigerate any leftovers.