Dissolve kosher salt in water. Place the peanuts in the water. Place a bowl on top to keep the peanuts submerged. Soak for at least 1 hour.
Preheat oven to 300 degrees.
Strain the peanuts. Pat dry and place in a single layer on a baking sheet. Roast at 300 degrees for 35-45 minutes. The peanuts will be slightly underdone (a little chewy) when you remove them from the oven, but they will continue to cook once you remove them. Allow to cool for 5 minutes.
Serve warm.
Notes
Nutrition information for estimation purposes only.