French Canadian Salmon Pie

Name: French Canadian Salmon Pie
Cuisine: French, European, Mediterranean
Ingredients: 1/4 tsp coarse black pepper; 1/4 tsp summer savory (can also use thyme); 1/2 tsp salt; 3 TBS melted butter; 1/2 medium onion, peeled and grated; ( I use the frozen mash you can buy nowadays, thawed completely and slightly warmed); 650g of cold mashed potatoes (2 cups); of either the skin or the bones); (I oftimes use two small boneless, skinless tins of salmon because I am not fond; 1 (418g) tin of salmon, drained well, flaked and mashed (1 15 1/2 ounce tin)