1 tbsp Chinese black vinegar (or white/balsamic vinegar)
1 tbsp Shaoxing wine
2 tbsp ketchup
1.5 tbsp sugar
1 tbsp sambal (or sriracha)
7 tbsp water
1 tbsp cornstarch
Small pinch of MSG (optional)
Directions
Cut the beef into 1/4-inch-thick bite-size slices against the grain. Add the marinade (soy sauce, Shaoxing wine, white pepper, baking soda), massage well, cover, and marinate 10 minutes.
Mince the garlic, grate the ginger, and dice the onion and red bell pepper. Whisk all the sauce ingredients together.
Add the egg white to the beef and gently massage, then toss the beef in the cornstarch until lightly coated, shaking off excess.
Fill a wok with oil and heat to 180C (355F). Fry the beef in 2 batches for 2-3 minutes until light golden brown, then drain on a wire rack.
Leave about 2 tbsp oil in the wok. Stir-fry the garlic and ginger until fragrant, then add the onion and bell pepper and stir-fry 1-2 minutes, keeping them crisp.
Pour in the sauce and simmer until thick and glossy. Add the fried beef and toss quickly to coat. Serve over hot rice.
A better-than-takeout Panda Express copycat (3-4 servings). From Aaron and Claire on Instagram; full recipe: https://aaronandclaire.com/panda-express-beijing-beef/