Set a heavy bottomed pot on medium heat. Once hot add oil and onion and saute for 2 – 3 minutes or until the edges of the onion turn slightly brown. Then add garlic and stir. Then add the seasonings and stir for 1 minute, then add the mushrooms. Continue stirring until the mushrooms are covered in the seasoning and oil.
Add dry white wine and reduce to about half. Then sprinkle in flour and stir until it is slushy. Pour in the vegetable broth and add the Dijon, then bring to a light simmer. Cover and cook for 10 – 15 minutes.
Then add plain, plant-based yogurt and stir quickly to avoid curdling. Simmer for another 5 minutes then remove from the heat to cool and thicken.
Garnish and enjoy! Note: if you plan to use this as part of another recipe, like a casserole, then consider dicing the mushrooms instead of slicing them.