Step 1Heat the oven to 250 degrees. Line a baking sheet with parchment paper.
Step 2Place the egg whites in a large stainless steel bowl and whisk until frothy. Slowly whisk in the sugar and salt until thick. Fold in the pecans and toss until well coated.
Step 3Transfer the pecans to the baking sheet and arrange in a single layer. Place in the oven and bake, stirring gently every 15 minutes, until the meringue covers the nuts with a chewy, pale golden brown coating, 35 to 40 minutes.
Step 4Remove from the oven and let sit for 5 minutes, then remove the nuts from the pan with a metal spatula and set aside to cool before serving.