Gather all ingredients and prepare your workspace.
Cut the chicken into bite-sized pieces and season with salt and black pepper.
Heat oil in a pan over medium heat and add the chicken pieces.
Cook the chicken until golden brown, about 6-8 minutes.
Remove the chicken from the pan and set aside.
In the same pan, add sliced bell peppers, onions, and garlic.
Sauté the vegetables until they are tender, about 5 minutes.
Return the chicken to the pan and add soy sauce and lemon juice.
Stir everything together and cook for another 3-5 minutes.
Serve hot, garnished with fresh cilantro.