How to make the best Creamy Seafood Chowder

This is so easy to make and it will impress many many people. Ingredients: 2 tbsp butter 1 onion fine diced 2 cloves garlic, minced 2 tbsp flour 3 cups fish stock or light chicken stock 3 cups milk 1/2 tsp salt 1/2 tsp pepper 2 large bay leaves 1/2 tsp dried thyme 1.2 kg assorted seafood and fish 1 1/2 cups cream