1. Preheat oven to 250 degrees Fahrenheit. Cover two baking sheets with parchment paper. Draw four four-inch circles on each piece of paper. Turn paper over. (You should be able to see the markings through the paper.)
2. Place salt and four egg whites in a large bowl; beat with a mixer at high speed until foamy. Gradually add 3/4 cup granulated sugar, one tablespoon at a time, beating until stiff peaks form.
3. Divide the egg white mixture evenly among the drawn circles. Shape meringues into nests with one-inch sides using the back of a spoon. Sprinkle evenly with nuts.
4. Bake at 250 degrees Fahrenheit for one hour. Turn oven off, and cool meringue nests in the closed oven for two hours. Remove from oven, and carefully remove meringue nests from paper.