This recipe is perfect for summer and features a super-fast fruit jelly that sets in just 5 minutes using frozen fruit. While jelly usually takes a long time to set, this recipe uses warm orange juice mixed with granulated gelatin to create a jelly base that sets surprisingly quickly with chilled frozen fruit. This recipe uses frozen mango, but other frozen fruits can be used as well. The preparation time is only 16 minutes and 28 seconds, making it an easy and delicious snack. We also share tips on why gelatin might not set and how to avoid overheating.