In a meals processor, mix the tomatoes, ginger, garlic, serranos, oil and cumin seeds and course of till clean. Switch the puree to a big, lidded heavy-bottomed pot or Dutch oven set over medium-high warmth, add the hen and prepare dinner, stirring often, till fragrant, 3 to 4 minutes. Add the inventory, improve the warmth to excessive and convey to a boil.