Beijing Beef - cooking recipe

Ingredients

Beef
1/2 - 3/4 lb sirloin steak, sliced into thin strips against the grain and on the diagonal (can sub flank steak and partially freezing makes for easy slicing)
1/2 cup cornstarch
oil (for frying)
Marinade
1 egg
1/2 teaspoon salt
1 tablespoon water
1/2 tablespoon cornstarch
Sauce
8 tablespoons water
4 tablespoons sugar
3/4 cup hoisin sauce (a double batch Hoisin Sauce Recipe OR 1/2 sweet&sour sauce and 1/2 hoisin sauce to = 3/4 cup)
2 tablespoons ponzu sauce, with citrus
4 tablespoons white vinegar
2 teaspoons chili paste sambal oelek (can sub sriracha)
4 teaspoons cornstarch
Vegetables
1 tablespoon vegetable oil
1 large garlic, minced
1/2 teaspoon minced fresh ginger
1 small red bell pepper, diced
1 small green bell pepper, diced
1 medium white onion, sliced
Garnishment
sesame seeds, lightly toasted

Preparation

In a bowl , whisk together all marinade ingredients. Place marinade in a small sealable plastic bag, adding beef slices. Seal and massage to coat; marinate for 15 minutes.
In the meantime, in a small bowl mix all the sauce ingredients together, whisking to completely combine; set aside. (I place the ingredients in a sealable container and shake.).
Drain marinade from beef. Coat the beef slices with cornstarch. (I place each coated slice on a piece of wax paper lightly dusted with corn starch so as not to stick.).
Heat oil over medium-high heat until very hot. Shake off any excess cornstarch from the beef slices and fry in batches until golden brown. Drain on paper towels; set aside. (Note: The beef may be fried in a wok, after which drain and wipe clean with paper toweling.).
Heat wok over medium-high heat. Add 1 tablespoons oil and heat to almost smoking. Add minced garlic and ginger and stir-fry for 10 seconds. Add bell peppers and onion; stir fry for 2 minutes. (Note: to keep the vegetables crisper, set vegetables aside and cook the sauce separate.).
Pour sauce mixture into the wok over the vegetables and heat until boiling and sauce thickens. Remove from heat then add beef to vegetables and coat with the sauce.
Sprinkle on top toasted sesame seeds.