Start by rinsing fresh cranberries under cold water and remove any damaged ones. Place them in a medium saucepan.

In the saucepan, add granulated sugar and water. Stir well to combine all ingredients evenly.

Place over medium heat and bring to a rapid boil, stirring occasionally. It'll take about 5-8 minutes until the cranberries pop.

Reduce heat to low and let the mixture simmer for 10-15 minutes, stirring occasionally until sauce thickens.

Remove from heat and stir in Grand Marnier, orange zest, and a pinch of salt. Ensure everything is well combined.

Allow the sauce to cool to room temperature in the saucepan before transferring to an airtight container for storage.