Step 1

Coat a large nonstick pan or wok with cooking spray.  Add 1 teaspoon oil.  Add chicken and squeeze the juice of 1 lemon over the top. Cook over medium-high heat, stirring often until chicken is completely cooked, about 4 minutes. Remove from pan and add to a plate.  Set aside.

Step 2

Coat the same nonstick pan with more cooking spray.  Heat 2 teaspoons oil in pan.  Add all the veggies and water.  Stir-fry for about 3 minutes until broccoli softens.  Stir in ginger, garlic, and red pepper flakes. Continue to cook and stir-fry for 1 minute. Add back chicken, add soy sauce, brown sugar, and vinegar. Reduce heat and simmer, stirring frequently, for about 5 minutes.