Finely mince mushrooms equaling one cup.
In a medium saucepan, heat olive oil over medium heat.
Cook mushrooms in olive oil 3-4 minutes.
After 3-4 minutes, add oat flour, garlic powder, onion powder, salt and pepper to mushrooms and stir.
Cook mushroom mixture 4-5 minutes stirring constantly.
Add vegetable broth to mushroom mixture and stir. Mixture will become very thick, almost paste like, do not worry.
Once you have your vegetable broth fully incorporated and mixture has become thickened, add your oat milk. Stir until smooth and remove from heat.