01 - Pour 1/2 cup of the fruit juice into a medium saucepan. Sprinkle the gelatin powder evenly over the surface and let it rest for 5 minutes until slightly thickened and bloomed.
02 - Place the saucepan over low heat and stir constantly until the gelatin dissolves completely. Do not allow the mixture to boil.
03 - Remove from heat and stir in the remaining fruit juice, collagen peptides, honey or maple syrup if using, and lemon juice. Whisk until the collagen is fully dissolved and the mixture is completely smooth.
04 - If using diced fresh fruit, gently fold the pieces into the mixture until evenly distributed.
05 - Pour the mixture into silicone molds or a parchment-lined 8x8-inch baking dish, filling each cavity or the dish evenly.
06 - Refrigerate for at least 2 hours, or until the jellies are firm and fully set throughout.
07 - Pop the jellies out of the silicone molds. If using a baking dish, cut into small cubes. Serve chilled and enjoy.