01 - Pour 1/2 cup of the fruit juice into a medium saucepan. Sprinkle the gelatin powder evenly over the surface and let it sit for 5 minutes until it blooms and becomes slightly thickened.
02 - Place the saucepan over low heat and stir gently but constantly until the gelatin dissolves completely. Do not allow the mixture to boil.
03 - Remove from heat. 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 now.
05 - Transfer the mixture into silicone candy molds or a parchment-lined 8x8-inch baking dish.
06 - Refrigerate for at least 2 hours or until the jellies are fully set and firm to the touch.
07 - Pop the jellies out of the silicone molds. If using a baking dish, cut into small cubes. Serve chilled.