Chop 13 oz Turkey Kielbasa Sausage into small cubes and set aside. Clean and devein shrimp. Season shrimp with fresh squeezed lemon juice, 1/2 tsp Cajun Seasoning and 1/2 tsp Old Bay. Set aside. Chop 1 small sweet onion, 4 stalks of celery, and 1 bell pepper. Set aside.
Heat 1 tsp of olive oil in large pot over medium heat. Add chopped turkey Kielbasa sausage to heated pot and cook until brown. Drain and set aside
Using the same pot, heat 6 tbsp of butter large pot over medium heat. Gradually sprinkle 6 tbsp of all-purpose flour into the butter and begin stirring immediately. Use a wire whisk if you are making your stew in a metal pot, or a wooden spoon if making it in a ceramic-coated one. The flour butter mixture will begin to thicken up rather quickly. Keep stirring constantly at this point to prevent it from burning. This process will determine the thickness and color of your stew. Continue stirring until it has a 'peanutty' smell, and is dark brown, about 10 minutes.
Once the desired color is reached, add chopped sweet onion, chopped celery and chopped bell pepper. Stir to cool flour butter mixture. Once ingredients are combined, add 32 oz of seafood stock, 8 oz of clam juice and 1 tsp of Worcestershire Sauce. Stir and combine. Once combined, add remaining Old Bay and Cajun Seasonings, 1/2 tsp onion powder, 1/2 tsp garlic powder, and bay leaf. Cover with pot lid and bring ingredients to a slight boil, then reduce heat.
Once heat is reduced, add cooked Turkey Kielbasa Sausage, chopped shrimp, and lump crab meat. Allow ingredients to cook together and stir occasionally until shrimp is cooked. Turn off heat, remove bay leaf, optionally serve with rice. The flavors of this stew intensify if refrigerated overnight. Enjoy!