impossibly easy tuna, tomato and cheddar pie

How To Make impossibly easy tuna, tomato and cheddar pie

• 1

  Heat oven to 400°F. Spray 9-inch pie plate with cooking spray. In 10-inch skillet, melt butter over low heat. Add onion; cook, stirring occasionally, until tender. Sprinkle tuna, 1/2 cup of the cheese and the onion in pie plate.
• 2

  In medium bowl, stir remaining ingredients except tomato with wire whisk or fork until blended. Pour into pie plate.
• 3

  Bake 25 to 30 minutes or until knife inserted in center comes out clean. Top with tomato slices and remaining 1/2 cup cheese. Bake 3 to 5 minutes longer or until cheese is melted. Let stand 5 minutes before serving.
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