In a mixing bowl, combine sliced chicken with sherry (first measurement) and cornstarch. Gently mix by hand until the chicken is coated with a thin layer of the mixture. Marinate for 10 to 15 minutes.
Combine soy sauce, sherry, corn starch, cracked black pepper, and sugar in a mixing bowl. Mix well and set aside
Heat oil in a large skillet over medium-high heat. Add the marinated chicken strips to the pan in a single layer. Sear the chicken on all sides until golden brown, about 5 minutes. Remove the chicken from the pan. Add the ginger and garlic and sauté until fragrant. Then, stir in the onions and bell peppers, and sauté for 5 minutes. Stir in the sauce mixture, chicken broth, and seared chicken. Cook for another 5-10 minutes until the sauce has thickened and coats the back of a spoon. Remove from heat.
To Assemble the Bowl
Scoop 1/2 cup of cooked jasmine rice into the bottom of an entree bowl.
In the center of the rice, portion 1 cup of black pepper chicken with vegetables.