Tuna Scalloped Potatoes

• 6 cups baking potatoes, peeled and sliced
• 1/4 cup yellow mustard
• 1/2 cup all-purpose flour
• 3 1/2 cups milk
• 1 teaspoon salt
• 1/2 cup condensed cream of mushroom soup
• 2 (5 ounce) cans tuna, drained
• 1 1/2 cups thinly sliced onions

1. Bring a large pot of salted water to a boil. Add potatoes and cook until tender but still firm, about 10 minutes; Drain. Preheat oven to 300 degrees F (150 degrees C).
2. In a saucepan, combine yellow mustard, flour, milk, salt and 1/2 cup of soup. Mix thoroughly and heat until thickened.
3. Starting with the potatoes, arrange the potatoes, tuna and onions, in alternating layers in a 9x13 inch baking dish. Pour the mustard sauce all over the top.
4. Bake in a preheated oven for 1 hour or until hot and bubbly.

baking potatoes, yellow mustard, allpurpose, milk, salt, condensed cream, tuna, onions

Taken from www.allrecipes.com/recipe/23569/tuna-scalloped-potatoes/ (may not work)