Chicken - Chop into bite-sized pieces. Sprinkle on some salt and pepper and tenderize with a fork. (Can be done up to 1 day ahead)
Mushrooms / Green onions / Water chestnuts / Iceberg lettuce / Oranges - Prep as directed. (Can be done up to 3 days ahead)
Make vinaigrette - Whisk together aminos, rice vinegar, honey, toasted sesame oil, and cooking oil. Season to taste with salt and pepper. (Can be done up to 5 days ahead)
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Heat a wok over medium-high heat. Add cooking oil and then chicken to heated oil. Saute until chicken is cooked through, 4 to 8 minutes (depends on how thick you cut the pieces).
Toss vinaigrette with chicken, mushrooms, green onions, water chestnuts, orange segments, and lettuce. Enjoy!