
Cook onion and pepper in large nonstick skillet over medium heat for about 3-5 minutes or until vegetables are soft. Set aside.
Meanwhile, place a medium saucepan over medium heat. Melt butter, then stir in minced garlic cloves. Cook about 1 minute or until garlic is soft and fragrant, stirring constantly.
Slowly add the heavy cream to the saucepan, whisk until cream comes to a boil. Reduce heat and simmer about 3-5 minutes or until it starts to thicken.
Stir in Parmesan cheese and 2 teaspoons Cajun seasoning until smooth and thick. Add more Cajun seasoning as desired. Then stir in cooked onions and peppers.