In a medium saucepan, bring sweet potato, 1 teaspoon salt, and water to cover by 2 inches to a boil over medium-high heat. Cook just until tender, about 2 minutes. Drain well.
In a small bowl, whisk together teriyaki sauce and cornstarch until smooth.
In a large skillet, heat oil over medium-high heat. Add shrimp; cook, stirring frequently, until pink and firm, about 2 minutes. Add onion, garlic, chipotle chile pepper, and remaining 1 teaspoon salt; cook for 1 minute. Add sweet potato and teriyaki mixture; bring to a boil. Cook, stirring constantly, for 5 minutes. Stir in pineapple; cook for 1 minute. Serve over noodles. Garnish with cilantro and peanuts, if desired.
Recipe by Paula Deen Magazine at https://www.pauladeenmagazine.com/shrimp-and-sweet-potato-stir-fry/