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 attached for texture.
02 - Cut the removed peels into uniform strips approximately ¼ inch wide for even candying and dipping.
03 - Place the strips in a saucepan, cover with cold water, and bring to a rolling boil for 2 minutes. Drain completely, then repeat this blanching process two more times to draw out excess bitterness from the pith.
04 - Combine the granulated sugar and water in a saucepan. Bring to a gentle simmer over medium heat, stirring constantly until the sugar fully dissolves.
05 - Add the blanched peels to the simmering syrup. Cook gently for 40 minutes, stirring occasionally, until the peels become translucent and fully candied.
06 - Using tongs, transfer the candied strips to a wire rack set over parchment paper. Allow them to dry for at least 1 hour until the surface is tacky but no longer dripping with syrup.
07 - Melt the dark chocolate in a heatproof bowl set over gently simmering water, stirring until smooth. Alternatively, melt in the microwave in 20-second bursts, stirring between each interval.
08 - Dip each candied peel strip halfway into the melted chocolate, allowing the excess to drip back into the bowl. Place each piece onto parchment paper.
09 - Sprinkle the chocolate-dipped portions lightly with flaky sea salt if desired. Allow the chocolate to set at room temperature for approximately 30 minutes until firm.