01 - Pour the fruit juice and lemon juice into a small saucepan. Sprinkle the powdered gelatin evenly across the surface and allow it to bloom for 3 to 5 minutes undisturbed.
02 - Place the saucepan over low heat and stir gently until the gelatin has fully dissolved. Do not allow the mixture to boil.
03 - Remove the saucepan from the heat. Whisk in the collagen peptides powder, honey or maple syrup, and vanilla extract if using, until the mixture is smooth and fully combined.
04 - Taste the mixture and add additional honey or maple syrup as needed to reach your preferred level of sweetness.
05 - Transfer the mixture into silicone jelly molds or a parchment-lined, lightly oiled square baking dish.
06 - Press sliced fresh berries or a pinch of citrus zest into each mold or across the surface of the dish for added color and flavor.
07 - Refrigerate the molds or dish for a minimum of 2 hours, or until the jellies are firm and fully set.
08 - Carefully release the jellies from the silicone molds. If using a baking dish, cut into even squares with a knife. Serve chilled.