Set a large pot on medium heat and melt the butter.
Add onions, garlic, oregano, stir and saute til onions golden. 5 minutes
add chipotles, tomato paste, anchovy paste, chili, cumin, and cook til fragrant, about 1 minute
Add the chicken and fold everything together with a wooden spoon, cook til no longer pink, 5 minutes
add tomatoes, beans, stock, stir to combine and bring to a boil on high
reduce to simmer, cover with lid, leaving a crack
cook for 30 mins, stirring occasionally
Add broccoli florets and maseca, cover and cook another 10 minutes