In a medium mixing bowl, combine the non-fat Greek yogurt, vanilla extract, monk fruit sweetener, and ground cinnamon.
Whisk the yogurt mixture vigorously for 1 minute until it becomes light, airy, and the flavors are fully incorporated.
Prepare the mixed berries by rinsing them under cold water and patting them completely dry with a paper towel; slice any large strawberries into quarters.
In a tall glass or mason jar, spoon in half of the whipped yogurt mixture to create the base layer.
Top the yogurt with half of the mixed berries, then sprinkle half of the hemp hearts and chia seeds over the fruit.
Add the remaining yogurt mixture as the next layer, followed by the rest of the berries.
Finish the parfait by topping it with the slivered almonds and the remaining hemp and chia seeds for a satisfying textural contrast.
Serve immediately or refrigerate for up to 4 hours to allow the chia seeds to soften slightly.