Add oil to a pan & sauté the diced onion for a few minutes. Add the minced garlic & cook another minute. Crumble the tempeh with your hands & add it cooking for about 5 minutes.
Add marinara sauce, nutritional yeast, Italian seasoning, oregano, thyme, garlic powder, onion powder & white miso paste & simmer for about 10 minutes. Season with salt & black pepper to taste.