Start by preheating your oven to 375°F (190°C). You want it nice and hot for those Vegan Mushroom and Quinoa Stuffed Peppers.
As the oven warms up, wash and halve your bell peppers, scooping out the seeds and white membranes. Set them aside.
Take that quinoa, rinse it under cold water. It's a small step, but crucial to remove any bitterness.
In a medium saucepan, combine the rinsed quinoa and vegetable broth. Bring it to a boil, then reduce to a simmer, covering it up for about 15 minutes. Your goal? Fluffy, cooked quinoa.
Heat olive oil in a skillet over medium heat. Toss in diced onions, and let them sweat until translucent.
Add garlic and mushrooms to the skillet. Cook them until those mushrooms are golden brown and all their moisture has evaporated.
Stir in your seasonings: oregano, smoked paprika, and some salt and pepper. Blend well.
Once your quinoa is cooked, fold it into your mushroom mixture, then stir in the tomato sauce, ensuring everything's well combined.
It's stuffing time! Fill each bell pepper half with your vegan mushroom and quinoa mix.
Line them up in a baking dish, and pop it into the oven. Let them roast for about 20-25 minutes or until the peppers are tender.
Once done, take them out and let them cool a bit.