Southwestern Sweet Potato Noodles

Name: Southwestern Sweet Potato Noodles
Ingredients: 3 small sweet potatoes (1 1/4 pounds), peeled; 1/4 cup vegetable oil; Kosher salt and freshly ground pepper; 1 small red onion, halved and thinly sliced; 1 red bell pepper, cut into thin strips; 1/2 to 1 small serrano chile pepper, thinly sliced into rounds; 1/2 cup frozen fire-roasted corn; 3 cloves garlic, finely chopped; 3/4 teaspoon ground cumin; 3/4 teaspoon chili powder; 1/2 teaspoon ground coriander; 1/2 cup fresh cilantro, roughly chopped; Juice of 1/2 lime, plus wedges for serving