Southwestern Quinoa Salad

Ingredients

• 2 medi­um sweet pota­toes, peeled and diced
• 1–2 tea­spoons olive oil
• ½ tsp. chili pow­der, divided
• ½ tsp. cumin, divided
• ½ tsp. sea salt, divided
• 1 cup quinoa, rinsed and drained
• 2 cups water
• ¼ tsp. gar­lic powder
• Juice of half a lime, plus more for dressing
• 1 can black beans, rinsed and drained
• 1–2 cups corn
• 2 large avocadoes