When the vegetables are soft, add the shrimp and simmer for 3 minutes, until the shrimp is just cooked through.
Remove from the heat and move all of the contents of the dutch oven to a blender. Blend until very smooth and set aside.
In the same dutch oven, melt the butter and stir in the flour. Cook for 1-2 minutes, until the roux thickens, then whisk in the half and half. Bring to a simmer, and when the mixture thickens, add the shrimp and stock puree back to the dutch oven, whisking constantly.
Season to taste with salt and pepper, then serve garnished with finely sliced chives and a drizzle of olive oil.
Recipe by The Taste Edit at https://thetasteedit.com/perfect-shrimp-bisque/