Tuna Potato Casserole Recipe

The Spruce Eats
Serves: 4 Save

Ingredients (9)

  • 5 medium potatoes, cooked and sliced
  • 3 tablespoons butter
  • 1/4 cup flour
  • 1 teaspoon salt
  • 1/8 teaspoon pepper
  • 1 1/2 tablespoons prepared mustard
  • 2 cups milk
  • 1 can (7 ounces) tuna, drained
  • 1 cup chopped onion

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Directions

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