Bake the peppers at 450° for 20 minutes, turning half-way. They should be tender.
Let peppers cool for a few minutes. Peel away the skin and cut out the stem. Cut a slit on one side and scrape out the seeds.
Sauté the onion a few minutes until soft. Add the tofu, mash and crumble it. Add the beans, vegetables (except spinach), garlic powder, and turmeric, and cook for a few minutes. Add the spinach and cook until it wilts. Stir in the nutritional yeast, and add salt and pepper to taste.
Scoop the tofu-bean mixture into the peppers. Warm in the oven if necessary. Serve with avocado slices, chopped tomato, and a drizzle of cashew cream.