Add frozen berries, salt, and fresh lemon zest to a medium-sized saucepan over medium heat. You can also add fresh lemon juice to further infuse the flavor, but there will be enough liquid from the frozen berries if you want to skip the lemon juice!
Cook the berries, stirring occasionally, so the mixture doesn't stick to the bottom. It will release moisture first, and then eventually come to a rapid boil once there's enough moisture in the saucepan.
Continue to cook, stirring constantly when it starts boiling. At this point, it'll reduce in volume and start to thicken (anywhere between 5 and 10 minutes) - your berry compote is ready!
Wash and remove the stems of approximately three cups of berries. If using larger fruits, try to get them into even sizes so they cook better! For instance, I slice my strawberries in halves.
Add the berries along with lemon juice, salt and lemon zest to a medium-sized sauce pan.
Use a masher or the back of a spatula to mash down the fruits so they start releasing some of their juices as well.
Cook the berries on medium heat, stirring occasionally until they come to a rapid boil. Then, continue to cook, stirring constantly, so it starts to thicken. Your berry compote is ready! Taste and adjust sweetness as desired.
