01 - Wash the oranges thoroughly under running water. Using a sharp knife, score each peel from top to bottom into quarters. Gently remove the peel in sections, keeping a thin layer of white pith intact for the best texture.
02 - Cut the removed peels into uniform strips approximately ¼ inch wide for even candying and a polished appearance.
03 - Place the peel strips in a saucepan, cover with cold water, and bring to a rolling boil. Boil for 2 minutes, then drain completely. Repeat this blanching process two more times to draw out excess bitterness from the pith.
04 - Combine 1 cup granulated sugar and 1 cup water in the saucepan. Bring to a gentle simmer over medium heat, stirring continuously until the sugar has fully dissolved and the liquid is clear.
05 - Add the blanched peels to the simmering syrup. Maintain a gentle simmer for 40 minutes, stirring occasionally to prevent sticking, until the peels turn translucent and appear glossy.
06 - Using tongs, carefully transfer the candied peels to a wire rack set over a sheet of parchment paper. Allow them to air-dry for at least 1 hour until the surface is no longer sticky to the touch.
07 - Place the chopped dark chocolate in a heatproof bowl set over a saucepan of barely simmering water, stirring gently until completely smooth and melted. Alternatively, melt in the microwave in 20-second bursts, stirring between intervals.
08 - Dip each candied peel strip halfway into the melted chocolate, allowing the excess to drip back into the bowl. Place each coated strip onto a fresh sheet of parchment paper.
09 - Sprinkle the chocolate-dipped portions lightly with flaky sea salt if desired. Let the treats rest at room temperature for approximately 30 minutes until the chocolate is fully set and firm.