How to Make It
In a medium saucepan, heat the oil over medium high heat until hot, then stir in the ginger, and garlic and cook, stirring, until golden, about 3 minutes. In a bowl, stir together the stock, sugar, soy sauce, cornstarch, vinegar, and samba oelek. Whisk the stock mixture into the saucepan and bring to a boil, whisking, until thickened. Reserve the sauce.
Cut the chicken into bite-sized pieces. In a bowl, whisk together the soy sauce, cornstarch, and 1/4 teaspoon each salt and pepper. Toss the chicken with the marinade.
In a medium pot, heat the oil to 375°F. Cook the broccoli in the oil, stirring occasionally, until bright green and tender, 5 to 6 minutes. Transfer the broccoli to paper towels to drain, and then toss with the sauce.
Bring the oil back to 375°F. Cook the chicken in batches, stirring occasion-ally, until browned and cooked through, about 4 to 6 minutes per batch. Transfer the chicken as cooked to paper towels to drain, and then toss with the sauce and broccoli. Transfer the chicken and broccoli to a serving platter and sprinkle with the sesame seeds. Serve.