This salmon bake is easy to make, with a homemade white sauce, canned salmon, and frozen thawed green beans. 
 1/4 cup butter
 1/4 cup all-purpose flour
 1/2 teaspoon salt
 1/4 teaspoon thyme leaves
 1/8 teaspoon pepper
 2 cups milk
 2 cups thawed frozen cut green beans
 1 can (16 ounces) salmon, drained and flaked
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In a medium saucepan, melt butter; blend in flour, salt, thyme, and pepper. Remove from heat; gradually stir in milk. 
Return to heat. Cook, stirring constantly, until bubbly. Let boil for about 1 minute, stirring constantly. 
Stir in green beans and salmon. Turn mixture into a buttered 1 1/2-quart casserole. 
Cover and bake at 375° for 30 minutes, until hot and bubbly. Serves 4 to 6.