Toast the pepitas in a small dry skillet over medium heat for 1 to 2 minutes, shaking the pan, until they smell nutty and start to pop. Tip them onto a plate.
Add the berries, honey, cinnamon, cardamom and water to the same skillet. Simmer over medium heat for 3 to 4 minutes, stirring now and then, until the berries soften and the juices turn syrupy. Stir in the lemon juice.
Stir the lemon zest and vanilla into the cottage cheese. For a silky texture, blend it for 30 to 45 seconds instead.
Spoon the cottage cheese into a bowl and pour the warm berries and their juices over the top.
Finish with the hemp hearts, toasted pepitas, flaky salt and mint. Eat right away.