Sweeten the berries. In a small bowl, toss the sliced strawberries with 1–2 tablespoons of your keto sweetener, a pinch of salt, and the lemon zest or juice if using. Let them sit for 5–10 minutes to release their juices.
Thicken the fruit (optional). If you prefer a jammy layer, sprinkle in the chia seeds and stir.
Let the mixture rest another 5 minutes until slightly thickened.
Mix the yogurt base. In a separate bowl, combine the yogurt, vanilla, and 1–2 tablespoons of sweetener. Taste and adjust. For extra richness, whisk in the heavy cream until smooth and fluffy.
Layer it up. Spoon a base of yogurt into glasses or bowls, add a layer of strawberries, then repeat.
Finish with a small spoonful of berries on top so the color pops.
Add crunch. Sprinkle with unsweetened coconut flakes or chopped nuts for texture. Almonds, pecans, or macadamias work especially well.
Chill briefly (optional). Pop the dessert into the fridge for 10–15 minutes if you want the flavors to meld and the strawberry layer to set a bit more.
Serve. Enjoy right away for a soft, creamy texture, or chill longer for a firmer parfait-style dessert.