Bring 1cm (1/2in) salted water to the boil in a medium pot. Chop broccoli into bite sized florettes. Add broccoli and cover. Boil for 5 minutes. Drain and keep warm.
While the broccoli is cooking make the butter. In a small bowl mash butter with the spice and lemon. Taste and season as needed. (It may not need any seasoning.)
Heat a small frying pan on a medium high heat. Season fish with salt. Add a splash of oil to the hot pan and cook fish for 3-5 minutes on each side or until cooked to your liking.
Divide broccoli between two plates or bowls. Top with cooked fish. Smear butter over the fish and finish with the roast nuts.