Place nuts in a 9 x 12-inch cake pan. Roast at 225 degrees for 30 minutes. While roasting, beat egg white stiff; fold in sugar and salt; fold nuts in. Melt butter at 350 degrees in a 9 x 12-inch pan; pour coated nuts to coat. Bake for 40 minutes at 350 degrees, stirring every 5 to 10 minutes, then drain on paper towel.