Prepare large shallow baking dish with aluminum foil, melt butter on shallow pan at 300 degrees F.Once butter is melted, stir in Worcestershire sauce, garlic salt and salt.Toss Chex cereal and mixed nuts on baking sheet to cover with butter mixture.Bake Chex for 30 minutes at 300 degrees F., stirring every 10 minutes. Allow to cool, enjoy and try not to eat it all in one sitting!Store in Ziploc® brand storage bags with Easy Open Tabs.