Place all the ingredients, except the vegetable stock and spring onions, into the slow cooker. Pour in the vegetable stock. Stir well.
Place the lid on the slow cooker and cook on low for 2½ to 3 hours until the peppers are soft, and the stock has been absorbed. The small white spiral (the germ) in the quinoa should be visible when cooked.
Stir through the spring onions. Season to taste with salt and pepper.
To serve: fill each soft tortilla with a small amount of mixed salad and top with quinoa mixture.
Vegan Serves: 6 Preparation: 10 mins Cooking: 2½ to 3 hrs