Begin by cooking your quinoa according to package instructions. I like to cook mine in a rice cooker with a 1:2 ratio of quinoa to water. Set this aside.
Preheat the oven to 400°F.
Slice all the plums in half and remove the pits. In a large bowl, toss them with the vanilla, red wine vinegar, thyme leaves, and 1 tbsp of the granulated sugar. The plums should start to release their natural juices, this is a good thing!
Put a cast iron pan on medium heat. Sear the plums face down for 2 minutes or until slightly charred, flip and sear another 2 minutes. Remove from the heat.
Place the plums in a separate bowl and wipe the cast iron out.
Mix the cinnamon, all spice and nutmeg into the quinoa with a pinch of salt. Then evenly pour the quinoa into the cast iron pan.
Spread the plums on top of the quinoa and sprinkle the remaining 1 tbsp of granulated sugar on top. Bake this at 400°F for 20-25 minutes or until the plums are very jammy and the quinoa has slightly crisped on top.
To serve, add a generous scoop of vanilla yogurt or skyr to each bowl, then a scoop of the quinoa and two plum halves. Serve immediately :)