Stir Fry Chicken - Uwajimaya

Ingredients

• 8 chicken thighs (skinned and cut into bite-size pieces)
• 1/2 teaspoon garlic powder (or more, to taste)
• 1/4 cup cornstarch
• 1/4 cup vegetable oil (or canola)
• 1 cup celery (cut on slant)
• 1 4-ounce can sliced water chestnuts (drained)
• 1 large ripe tomato (cut into bite-size pieces)
• 1 4-ounce can sliced mushrooms (drained)
• 1 cup green onion stalks (cut into 1-inch pieces)
• 1/4 cup soy sauce
• optional: 1/4 – 1/2 teaspoon chili flakes or Japanese chili pepper