Beat egg whites, cream of tartar, and salt to soft peaks in medium bowl. Beat in sugar gradually, beating to stiff, shiny peaks. Fold in coconut; fold in hazelnuts.
Drop mixture by tablespoons onto parchment-or aluminum foil-lined cookie sheets. Bake at 300 degrees until cookies begin to brown and feel crisp when touched, 20 to 25 minutes. Cool in pans on wire racks.