- In a large shallow baking pan, toast hazelnuts in 325º oven, 15 minutes, stirring occasionally.
- Meanwhile, beat egg whites until foamy; gradually add sugar and salt, beating until stiff.
- Fold in toasted hazelnuts.
- Melt butter in same pan; spread nut mixture on top.
- Bake 30 to 40 minutes at 325º or until nut are browned and butter is absorbed.
- Stir nuts thoroughly every 10 minutes during baking.