DIRECTIONS
Preheat the boiler.
Rinse the bluefish and pat dry with a paper towel. Arrange in a large cast iron skillet, sheet pan, or alternatively, on a roasting pan.
In a small mixing bowl, combine the mayonnaise and mustard. Slather the fish with the mustard mixture until it’s coated with a thin layer.
Transfer to the oven and bake under the broiler for 4 to 5 minutes, or until the mustard mixture has begun to brown in spots and the fish is cooked through.
While the bluefish bakes, in a small skillet, heat 1 tablespoon olive oil. Sauté the breadcrumbs, garlic and thyme leaves (if using) over medium-high heat until crispy and very fragrant, about 2 minutes.
Right before you’re ready to serve, top the baked bluefish with the toasted garlicky breadcrumbs.