Roast the poblano chiles and take off their skin and seeds
Fried your tortillas a bit
Blend until smooth: the poblano chiles, cream cheese, cilantro, onion, garlic clove, pumpkin seeds, chicken bouillon and water.
Start layering the lasagna: in a baking dish pour some of the sauce, add the tortillas, then shredded chicken, oaxaca cheese, a bit more sauce. Repeat.
Bake covered at 350 degrees for 30-40 min. And then broil uncovered on high for 5-10 minutes.