Combine chicken, salt, turmeric, cumin, and coriander in a bowl. Coat thoroughly, cover, and refrigerate for 30 minutes to absorb the flavors.
Melt butter in a skillet over medium heat. Cook marinated chicken for 5-7 minutes until browned. Set aside to keep the chicken juicy.
Sauté garlic in the same skillet for 1-2 minutes. Add pureed tomatoes and garam masala, simmering until sauce thickens, about 5 minutes.
Return chicken to skillet, pour in heavy cream, and stir well. Simmer 10 minutes for flavors to meld beautifully.
Preheat oven or air fryer, then bake frozen fries until golden and crispy (20-25 minutes). Adjust timing if air-frying.
Plate the creamy chicken alongside crispy fries. Garnish with fresh cilantro for a vibrant, appetizing presentation.