Shrimp & Crab Pasta with Creamy Cajun Sauce

1 red bell pepper 1 yellow bell pepper 1/2 white onion, chopped 1 rib celery 2 Tbsp butter 2 Tbsp Cajun seasoning, divided 3 cloves fresh garlic, chopped 3 tablespoon of flour 1 lb spaghetti pasta, cooked Salt 1 C reserved pasta water 1 C heavy cream 2 cups of fresh grated parmesan 2 tsp … Read more