Preheat a large skillet over medium-high heat and add in 1/2 cup of lard. When the lard begins to sizzle, add in the diced pork and sauté it until lightly browned on all sides, about 5 minutes.
Add garlic, onion, mustard powder, sage, pepper and cumin. Sauté for another 3-4 minutes or until the onions are softened and lightly browned.
Sprinkle the flour over the top of the mixture and stir for 2 minutes to create a roux. Then stir in the tomato paste and oregano until evenly combined before adding in the jalapeños, green chilies and diced tomatoes.
Add in the water and chicken broth and stir to combine. Bring the mixture to a boil, then reduce heat to low, cover the pot and simmer for 30 minutes.
Once cooked, season to taste with salt and pepper before serving over grilled meats or other dishes.