Set up a double boiler. You can do this by placing a small pot of water on medium heat. Add a heat-proof bowl on top, filled with chocolate. (Make sure the water does not boil over but stays hot enough to melt the chocolate in the bowl.) Stir until the chocolate melts completely.
On a parchment lined baking tray, arrange the cashews or nuts of choice into a wreath arrangement. Use a spoon to pour the chocolate in the inner portion of the wreath created. Additionally, you can mix the nuts into the chocolate and use a fork to place the nuts into a wreath arrangement.
Place green and red mini m&m's on top of the chocolate as desired. Place tray in fridge for 20 minutes, or until chocolate is firm to the touch.