Preheat oven to 400°F.
In a small sauce pot over low heat, combine the Manuka honey and Dijon mustard. Stir gently, keeping the temperature below 100°F to preserve the honey's natural benefits.
Season the salmon filet with kosher salt.
Brush the top with a layer of the honey-Dijon mixture, then transfer to a lined baking sheet.
Bake for 10–12 minutes, or until the internal temperature reaches 145°F.
While the salmon cooks, stir the pickled mustard seeds into the remaining honey-Dijon sauce, again keeping the heat low.
Plate the salmon over a bed of greens. Spoon additional honey-mustard sauce over top.
Finish with flaky salt, dill fronds, and edible flowers. Serve immediately.