Dice the white bases of 2 green onions (reserve the green parts for garnish). Finely chop 1/4 cup water chestnuts. In a small bowl, mix 1 tablespoon water with 1 teaspoon cornstarch to make a slurry and set aside.
Heat a large skillet over medium heat. Add 1 tablespoon light olive oil and the diced green onion white bases. Sauté for 30 seconds until fragrant.Add 1 pound ground chicken to the skillet, breaking it apart with a wooden spoon. Pour 1 tablespoon soy sauce, 1 teaspoon toasted sesame oil, and 1 teaspoon rice vinegar over the meat. Sprinkle with 1 teaspoon garlic powder (or 3 minced garlic cloves), 1 teaspoon paprika, 1/2 teaspoon salt, and a dash of pepper. Cook for 3-4 minutes, stirring occasionally, until the meat is almost cooked through. Add 1/4 cup diced water chestnuts and 1 teaspoon grated ginger (or 1/2 teaspoon ground ginger). Stir and cook for 2 minutes, allowing the flavors to meld together.
Give the cornstarch slurry a quick stir, then pour it over the meat mixture. Stir continuously for 1-2 minutes until the sauce thickens slightly and coats the chicken. Remove from heat and serve immediately.