Nutrition values are an estimate and include the optional vegan cheese. 1 1/2 cups of cooked quinoa is about 1/2 cup dry. Drain the tomatoes well so the filling is not watery. If your peppers have very thick walls, keep them covered for an extra 10 minutes. Baked peppers keep in the fridge for up to 4 days or in the freezer for up to 3 months.