In a large pot, heat oil over medium heat. Add onions, carrots, and celery. Cook, stirring occasionally, until soft and translucent, about 5-6 minutes.
Add tomato paste and garlic powder. Cook for 2-3 minutes, stirring frequently, until fragrant.
Stir in onion powder, paprika, cumin, marjoram, salt, pepper, lentils, vegetable stock, and tomatoes. Bring to a boil, reduce heat to low, cover, and simmer for 5 minutes. Stir in quinoa and bring back to a simmer. Cover and continue to cook for 15-20 minutes or until lentils are cooked through and tender.
Serve with shredded cheese and enjoy!