Preheat your oven to 300°F (150°C) and line a large baking sheet with parchment paper.
In a large, clean glass bowl, whip the egg whites and cream of tartar using a hand mixer or stand mixer until soft peaks form.
Gradually add the monk fruit sweetener one tablespoon at a time while continuing to whip until the whites are stiff, glossy, and hold their shape.
Spoon the meringue onto the parchment paper into two large rounds, using a spoon to create a small well in the center of each.
Place in the oven and immediately reduce the heat to 250°F (120°C); bake for 45 minutes, then turn off the oven and let the pavlovas cool completely inside with the door slightly ajar.
While the pavlova cools, whisk together the Greek yogurt, lemon zest, lemon juice, and vanilla extract in a small bowl until smooth and creamy.
Peel the kiwis and slice them into thin rounds.
To assemble, fill the center of each cooled pavlova nest with the lemon cream, then layer on the kiwi slices and blueberries.
Garnish with a sprinkle of hemp hearts for added texture and serve immediately.