2 pounds chicken skin with its fat
Diamond Crystal kosher salt
1. Spread the chicken skin and fat out on a baking sheet in an even layer. Place the tray in the freezer until the skin is partially frozen, about 1 hour. (This will make it easier to cut.) Transfer the chicken skin to a cutting board and cut it into 3-inch-long strips; then cut each strip crosswise into 1/2-inch pieces.
2. Preheat the oven to 350 degrees. Place the chicken skin pieces in a large roasting pan and toss them with 2 teaspoons of salt. Bake for 20 minutes, then remove the pan from the oven to give the skin pieces a stir. Return them to the oven and continue to bake, stirring every 10 minutes or so, until the chicken skin pieces have rendered their fat and are crisp and nicely browned. (The cooking should be monitored closely, especially as the chicken skin pieces start to brown, because they can go from browned to burned very quickly.) Remove the pan from the oven and let it cool for 15 minutes.
3. Carefully pour all the contents of the roasting pan through a metal strainer into a metal pot or other heatproof vessel. Leave the container over the pot to let the gribenes drain a couple of minutes more; then transfer the gribenes to a tray or plate lined with several layers of paper towels. Allow both the schmaltz and the gribenes to cool to room temperature.
4. Season the gribenes with more salt to taste if needed, and store them in an airtight container at room temperature for up to 3 days. Transfer the schmaltz to a covered container and refrigerate it for up to 2 weeks.