Salmon Burgers

1 lb. salmon
1/2 c. chopped onions
1/4 c. melted butter
1/3 c. dry bread crumbs
2 eggs, beaten
1 tsp. mustard
1/2 c. bread crumbs

4 buttered hamburger rolls. Drain liquid from salmon and reserve. Break salmon into small pieces. Saute onions in butter. Mix onion, 1/3 bread crumbs, eggs, mustard, pinch salt, salmon and liquid. Roll burgers in 1/2 cup bread crumbs and fry 3-4 minutes on each side until brown.