Heat the 12” (30-cm) Nonstick Skillet over medium heat for 3–5 minutes. Toast the oats (and nuts, if using) for about 4–6 minutes, or until browned and fragrant.Remove the oats and nuts from the skillet and add them to a mixing bowl. Add the remaining add-ins.Microwave the brown sugar, honey, and oil in a small microwave-safe bowl on HIGH for about 1 minute, or until bubbling. Pour the honey mixture over the oat mixture; mix well.Use the Large Scoop to transfer the mixture into the wells of the Snack Bar Maker. Press down with the Mini Nylon Serving Spatula. Chill the tray in the freezer for about 10 minutes, or in the refrigerator until set.