Preheat the oven to 420°F. Place the sweet potatoes and onions on a baking tray and mix well with the oil, taco seasoning and salt/pepper (if needed). Bake for 10-15 minutes or until the sweet potatoes are done.
Mix in the black beans, corn kernels and lime juice. I find it’s not necessary to heat them, but if you are a lover of piping hot food — doreturn the tray to the hot oven for a few minutes.
Warm the taco shells in the hot oven and serve with the filling, sliced red cabbage, avocado and cheese. A little hot sauce or BBQ sauce on top tastes pretty fantastic, too.
Notes
I used one orange and one purple sweet potato, but anything you have works just fine.
Salt and pepper are optional in case you use unsalted taco seasoning or prefer to mix your own spices.