Remove the skin and all fat from the chicken pieces. Cut chicken into 2" pieces. Rub salt and turmeric on the chicken pieces. Set aside.
Heat the oil in a frying pan over medium-high heat. Add the mustard seeds, cover with a lid to avoid splattering and cook until they stop popping.
Add the daal, fennel seeds and red chilies. Fry until the chilies darken.
Add the onion and fry until golden brown.
Add the chicken and fry for about 5 minutes, stirring constantly.
Add the water, 1 tablespoon at a time, while continuing to stir.
Cook until the chicken is tender and slightly brown or about 10-12 minutes.
Garnish with chopped cilantro.