Cook the spinach according to package instructions using unsalted water, drain well.
In a saucepan, add the soup, cheese, wine, mayo, Worcestershire sauce, and lemon peel. Stir together and bring to a boil, remove from heat.
Add drained spinach to a mixing bowl, and add ½ cup of the sauce, mix together.
Preheat your oven to 180° C (350° F), get out 6 individual casseroles,
Divide the spinach into 6 individual casseroles.
Break salmon into chunks, removing skin and bones, and divide among the casseroles.
Top the salmon with remaining sauce.
In a small mixing bowl, add the breadcrumbs and melted butter and mix together. Sprinkle over each casserole.
Bake for 25 minutes or until bubbly.
Serve and enjoy.