Heat olive oil in a skillet over medium heat.
Add chicken breasts and sear both sides until lightly golden.
Remove chicken and set aside.
In the same pan, add chopped green onions and sauté for 2 minutes.
Stir in chopped tomatoes, garlic salt, and half the garam masala. Cook until tomatoes soften.
Add water and return chicken to the skillet. Cover and simmer for 10 minutes.
Sprinkle the remaining garam masala on top and stir gently.
Cook uncovered for 2–3 minutes until the sauce thickens slightly.