Cut sweet potatoes in half & season with oil, salt, pepper, garlic, and onion powder.
Bake sweet potatoes face down at 375°F for 45–60 minutes until tender.
Brown the ground beef with taco seasoning.
Mix the corn, Greek yogurt, mayo, lime juice, cotija, cilantro, and a pinch of chili powder, garlic powder, and salt.
Assemble by mashing sweet potato, add taco meat, top with the street corn mixture, and finish with extra cotija, cilantro, avocado, and a squeeze of lime!
