Add the rinsed quinoa, pinto beans, diced tomatoes with green chilies, corn, onion, garlic, and bell pepper to the slow cooker.
Pour in the vegetable broth and stir in the chili powder, cumin, and salt until everything is evenly combined.
Cover and cook on low until the quinoa has absorbed most of the liquid and is tender.
Stir the mixture once more, then divide into bowls.
Top each serving with chopped cilantro, a squeeze of lime, and avocado slices.