How to Make It
Cook the bacon in a large saucepan over medium heat until crisp, 5 to 7 minutes; transfer to a plate. Increase heat to medium-high.
Add the onion and celery to the drippings in the saucepan and cook, stirring often, until beginning to soften, 3 to 5 minutes. Add the broth, potatoes, bay leaf, crushed red pepper, ¾ teaspoon salt, and ¼ teaspoon black pepper. Bring to a simmer and cook, stirring occasionally, until the vegetables are tender, 15 to 18 minutes.
Add the fish to the broth mixture in the saucepan and cook until opaque throughout, 3 to 5 minutes. Remove the bay leaf. Sprinkle with the chives, bacon, and celery leaves.