Scalloped Poatoes with Ham

From Fix-It and Forget-It Cookbook

6C raw potatoes, cut into small cubes
1 medium onion, minced
1 tsp salt
1/2lb cooked ham, cubed
4 Tbsp butter
4 Tbsp flour
1 tsp salt
2 C milk
1 1/2 C shredded cheddar cheese

Layer potatoes, onion, 1 teaspoon salt, and ham into slow cooker.
Melt butter in saucepan. Stir in flour and 1 teaspoon salt. Cook until bubbly. Gradually add milk. Cook until smooth and thickened. Add cheese and stir until melted. Pour over potato-ham mixture, stirring lightly.
Cover Cook on low 6-7 hours or high 3-4 hours.