Melt white chocolate candy melt and peanut butter in the microwave for 1 minute. If mixture needs additional melting, melt for an additional 15 seconds at a time until melted. Combine 1 cup of the nut medley and cereal in a large bowl. Pour melted mixture over ingredients in bowl, stirring carefully to combine. Spread to about 1/4-inch thickness on large cookie sheet covered with wax paper or parchment paper and top mixture with remaining nut medley, pressing on the nuts to push them into the mixture. Allow to set for about 45 minutes. Once hard cut into bite-sized squares with a serrated knife. Serve on a serving platter.