Use your favorite combination of nuts to make this quick and easy chocolate nut bark.
Line a rimmed baking sheet with foil. (Take care to avoid wrinkles.) Combine melted chocolate and nuts in a medium bowl. Scrape the mixture onto the foil and spread it into an approximate 12-by-9-inch rectangle. Sprinkle with additional finely chopped nuts, if desired. Refrigerate until set, about 20 minutes.
Transfer the bark and foil to a cutting board. Use a sharp knife to cut into 1 1/2-inch pieces.
Tip: To melt chocolate, microwave on Medium for 1 minute. Stir, then continue microwaving on Medium, stirring every 20 seconds, until melted. Or place chocolate in the top of a double boiler over hot, but not boiling, water. Stir until melted.