Heat the oil in a large skillet and saute the onions, garlic, and poblano peppers. Add the cream cheese, green chiles, cumin, coriander, oregano, chili powder, salt, and pepper. Stir in ¼ cup Mexican crema and ¼ cup green enchilada sauce. Combine the remaining sauce and crema in a bowl and spread ½ cup into the bottom of the baking dish.