Saute onion in oil in large saucepan or Dutch oven for 5 minutes
or until
tender. Stir in flour, salt, thyme and pepper. Cook over low heat
until
mixture is smooth and bubbly; remove from heat. Stir in evaporated
milk
gradually. cook over low heat until thickened and smooth, stirring
constantly. Stir in spaghetti, sherry, salmon, olives and green
pepper.
Pour into 1 1/2 quart baking dish sprayed with nonstick cooking
spray.
Sprinkle with Parmesan cheese. Bake at 350F for 20 to 25 minutes
or until
bubbly.