Begin by rinsing the fresh cranberries under cold running water. Inspect them carefully, removing any stems or berries that appear damaged or spoiled.
In a medium-sized saucepan, combine 1 cup of filtered water and 1 cup of granulated sugar. Place over medium heat and bring the mixture to a gentle boil, stirring continuously until the sugar is fully dissolved into the water.
Once boiling, incorporate the rinsed cranberries into the saucepan. Allow the mixture to return to a boil, then reduce the heat to a low simmer. Cook for 10-15 minutes, stirring occasionally, until the cranberries pop open and the sauce begins to thicken.
After the cranberries have burst, add the orange zest, ground cinnamon, pure vanilla extract, and salt to the saucepan. Stir well to integrate these flavors. If using, fold in the chopped walnuts or pecans for an extra layer of texture and flavor.
Remove the saucepan from the heat and let the cranberry sauce cool down at room temperature. It will thicken further as it cools, enhancing its consistency.
Once cooled, carefully transfer the cranberry sauce to a decorative serving dish or an airtight container. Refrigerate until ready to serve; the flavors will meld beautifully as it chills.
Notes
For an eye-catching display, serve the cranberry sauce in a beautiful bowl and garnish with additional orange zest and whole cranberries.