In a pot of boiling water, blanch the carrots, broccoli and cauliflower for 30 seconds each. Immediately remove each to an ice bath to cool and stop the cooking. Drain and set aside.
In a large saute pan over high heat, saute the chicken slices in the oil, garlic, ginger, and soy sauce, tossing for 2 minutes. Next, add the chili flakes, bell pepper, mushrooms, spinach, blanched veggies, zucchini, and scallions. Continue to toss for an additional 3 minutes. Add a splash more of soy sauce, if desired, and continue to cook for an additional minute. Remove from heat. Plate 5 strips of chicken on each plate and 8 ounces of stir-fried vegetables per plate. Garnish with a sprig of cilantro.