Preheat your oven to 325°F (160°C) and lightly grease a 4-inch springform pan or a large ramekin.
In a small bowl, mix the almond flour with a teaspoon of water or monk fruit sweetener until it reaches a crumbly consistency, then press it firmly into the bottom of the pan to form a crust.
In a separate mixing bowl, whisk together the Greek yogurt, egg whites, whey protein isolate, monk fruit sweetener, and vanilla extract until the batter is completely smooth and free of lumps.
Pour the yogurt mixture over the almond crust and smooth the top with a spatula.
Bake for 25 to 30 minutes until the edges are firm and slightly golden, but the center still has a slight jiggle.
Remove from the oven and let it cool to room temperature, then refrigerate for at least 2 hours to allow the cheesecake to fully set.
While the cheesecake chills, place the mixed berries in a small saucepan over medium heat and simmer for 5-8 minutes until they break down into a jammy sauce.
Top the chilled cheesecake with the warm berry compote just before serving.