Nutrition values are an estimate, based on 12 pieces. For clean slices, allow the bark to sit at room temperature for a few minutes before cutting. Store in an airtight container in the refrigerator for up to 1 week. Freeze for up to 2 months and thaw in the refrigerator before serving. For anyone vulnerable, toast the oat flour at 350°F (180°C) for 5 minutes and cool it first, or replace it with more almond flour.