Remove bones from the salted silver salmon and cut into bite-sized pieces.

Slice the onion thinly and divide the broccoli into small florets. Steam the broccoli with 1 tbsp water in a microwave-safe container for 90 seconds at 600W. Drain and let cool.

Melt butter in a frying pan over medium-low heat. Add the onion and sauté until translucent. Add water and the salmon, stir gently, and bring to a boil. Cover and simmer on low heat for 8 minutes.