Vegan Potatoes Au Gratin

6 large potatoes, peeled and cubed
1 1/4 cups vegetable broth, divided
2 tablespoons all-purpose flour
1 teaspoon seasoning salt
1/2 teaspoon ground black pepper
1/4 teaspoon dry mustard
1/8 teaspoon nutmeg
2 cups soy milk
3/4 cup + 3/4 cup Daiya nondairy cheddar cheese shreds
1 cup soft bread crumbs
Paprika for sprinkling

Preheat oven to 350 degrees F.
Bring a large pot of salted water to a boil. Add potatoes and cook until tender but still firm, about 15 minutes. Drain and place in a 9 x 13 inch baking dish.
Meanwhile, in a small saucepan over high heat, boil 2 tablespoons of broth. Reduce heat to low. Stir in flour, seasoning salt, pepper, mustard and nutmeg. Gradually add soy milk, stirring constantly until thickened. Stir in 3/4 cup of cheese. Stir constantly until cheese is melted. Pour over potatoes.
In a small bowl combine the remaining broth and the bread crumbs. Spoon evenly over potatoes. Top with remaining soy cheese. Sprinkle with paprika.
Bake in preheated oven for 20 minutes.
Cheese sauce only covers the potatoes half way so soymilk and spices may be doubled if more sauce is desired.

Altered from http://allrecipes.com/recipe/vegan-potatoes-au-gratin/