1-1/4 pounds boneless skinless chicken breast, cut into 1-inch pieces
1 medium red bell pepper, cut into thin strips
1 medium green bell pepper, cut into thin strips
1 small onion, chopped
2 garlic cloves, chopped
1 teaspoon salt or to taste
Pinch of black pepper
Soy sauce to taste
1 lemon, cut into wedges, for garnish