To make the compote, simply place the fruit, sweetener and lemon/lime juice (and vanilla if you're making the strawberry compote) in a saucepan and bring to a simmer. Simmer for 10-15 minutes or until the fruit has broken down and the compote has thickened slightly. Keep in mind that it will continue to thicken as it cools.
Remove the compote from the heat and allow to cool.
Layer with the Greek yogurt in sealable jars/containers and place in the fridge for up to 5 days.