Dice the bacon.

Fry bacon until medium crisp.

Set bacon aside, reserving drippings.

Grate potatoes into a bowl.

Put grated potatoes in a colander and let drain to remove excess moisture.

Return drained potatoes to the bowl.

Add flour and beaten eggs to the potatoes.

Stir to combine.

Add milk, evaporated milk, grated onion, and salt.

Stir until well mixed.

Stir in the fried bacon.

Grease a rectangular baking pan with reserved bacon drippings.

Pour the potato mixture into the prepared pan.

Bake at 350 degrees F (175 degrees C) for 1 to 1 1/2 hours.

Bake until the top is toasty brown but not burned.

Let stand for 10 minutes before serving.

Serve hot with sour cream.