I melt the butter over medium heat, then add minced garlic. I stir constantly for about a minute until the garlic becomes fragrant and just begins to color — careful not to let it burn.
Next, I sprinkle in the Cajun seasoning and combine it with the butter and garlic. I let it cook for 30 seconds, stirring, so the spices release their aroma and flavor.
I immediately stir in the corn and shrimp. I cook them for about 3–4 minutes, just until the shrimp turn pink and opaque. This ensures shrimp stay tender and don’t overcook.
Then I pour in the fish or chicken stock, increasing heat to bring it to a gentle simmer, then reducing to medium-low. I allow it to simmer for 10–15 minutes, stirring occasionally so it doesn’t stick or scorch.
Once flavors meld, I slowly stir in the heavy cream (or half-and-half). I bring the mixture back to a gentle simmer, letting it cook 5 more minutes so everything melds and the soup thickens slightly.
I taste the bisque and adjust salt and pepper to my liking. Then I ladle it into warm bowls and optionally garnish with fresh herbs, a swirl of cream, or a sprinkle of paprika before serving.