Ingredients:
- 2 pounds potatoes, peeled and thinly sliced
- 1 1/2 cups cooked ham, diced
- 1 small onion, finely chopped
- 3 tablespoons butter
- 3 tablespoons all-purpose flour
- 2 cups milk
- 1/2 teaspoon salt
- 1/4 teaspoon pepper
- 1/4 teaspoon paprika
- 1 cup shredded sharp cheddar cheese
- 1/2 cup grated Parmesan cheese
