01 - Lightly coat a silicone jelly mold or an 8-inch square pan with neutral oil to prevent sticking.
02 - Pour the fruit juice into a medium saucepan. Sprinkle the gelatin and collagen peptides evenly over the surface and let bloom for 5 minutes.
03 - Stir in the fresh lemon juice and honey or maple syrup, blending gently to combine.
04 - Warm the mixture over low heat, stirring constantly, just until the gelatin and collagen fully dissolve. Do not allow the mixture to boil.
05 - Remove from heat and gently fold in the diced berries and citrus zest for added texture and brightness.
06 - Pour the mixture into the prepared molds or pan. Refrigerate for at least 2 hours, or until completely firm and set.
07 - If using a pan, loosen the edges and cut into uniform cubes. If using shaped molds, carefully remove each jelly from the forms.
08 - Transfer to an airtight container and keep refrigerated for up to 1 week.