Butter the mold and sprinkle with cheese. Preheat oven to 400 degrees. Measure out all your ingredients.
Cook the shallots or onions in the butter for a moment in the saucepan. Add the flour and cook 2 minutes. Off heat, beat in the boiling liquid, then the seasonings, tomato paste, and herbs. Bring to boil, stirring, for 1 minute.
Off heat, beat in the egg yolks one by one. Then beat in the salmon and all but a tablespoon of cheese.
Beat the egg whites and salt until stiff. Stir one fourth of them into the soufflé mixture. Fold in the rest. Turn into prepared mold and sprinkle with the remaining cheese. Set in middle level of preheated oven. Turn heat down to 375 degrees and bake for about 30 minutes.