Mushroom and Quinoa Minestrone Soup

quinoa (I used tricolor quinoa which is a mix of whole grain white, red and black quinoa)

olive oil, divided

white or brown mushrooms, chopped

medium onion, chopped

celery stalks, chopped

medium carrots, grated

medium zucchini, peeled and chopped

red bell pepper, cored and chopped

(28 oz/796 ml) diced tomatoes

L/4 cups vegetable stock

water

(19 oz/ 540 ml) red beans, rinsed and drained

dried oregano

dried basil

garlic powder

salt and pepper