Combine all ingredients in a large bowl and mix with hands to coat thoroughly. Cover and refrigerate for 30 minutes before cooking.
Notes
Make sure your meat is dry before slicing and marinating. Water is not a flavor enhancer and will only serve to dilute flavor and make browning more difficult.
DON'T drown your protein in your marinade. Remember, you're marinating for a stir-fry. Too much liquid as you stir-fry your protein results in steaming, and nobody likes steamed meat, right?
DON'T add minced aromatics to your marinade, like garlic, ginger, or scallions. Stir-frying is high heat cooking, and those minced aromatics rapidly burn. Instead, add them toward the end of the stir-fry.