IMPOSSIBLE (BACON) PIE (use fish instead of bacon: Herzog)

spray pie plate with PAM
half litre sealer of fish
1 cup (250 ml) grated Swiss cheese
1/3 cup (75 ml) chopped onion
2 cups (500 ml) milk
1 cup (250 ml) Bisquick baking mix.
4 eggs, ¼ teaspoon salt, dash of pepper

Heat oven to 400 F (200C) Sprinkle the fish, cheese and onion in pie plate. Beat the remaining ingredients until smooth. Pour in plate. Bake until brown, until knife inserted halfway between centre and edge comes out clean. Let stand 5 minutes before cutting.