Blend the rhubarb and some thyme leaves with a little water into puree and put it in a saucepan over medium heat. Add a tbsp of honey and let it simmer for about 5 minutes or until you reach a jam consistency. Let it cool for about 10 minutes or more.
In a glass add layers of jam, yogurt, and granola. On the top layer put granola and some thyme leaves. Serve and enjoy!