Combine walnut halves and almonds in a 2-quart glass baking dish (12 x 17-inch).

Microwave on High for about 2 minutes or until hot.

In a small mixing bowl, beat the egg white until stiff peaks form.

Beat in sugar and salt until well combined.

Stir the hot nuts into the egg white mixture.

Set aside the nut mixture.

Place butter in a separate 2-quart glass baking dish (12 x 7-inch).

Microwave the butter on Roast for about 1 minute or until melted.

Add cinnamon (if desired) to the nut mixture and mix well.

Spread the nut mixture into the melted butter.

Microwave on Roast for 6 minutes.

Stir the mixture well and continue cooking on Roast for an additional 5 minutes or until glazed.

Stir well again.

Let the mixture stand for 10 minutes until cool and hardened.

Break apart the hardened mixture and serve.