Cook the bacon in a skillet over medium heat until crisp, 5 minutes. Strain and
reserve the drippings for another use. Set the bacon aside.
Cook the beef and pork in the peanut oil over medium-high heat until brown,
about 10 minutes. Add the onions and jalapenos and cook until the onions are
tender, 10 minutes.
Add the oregano, cumin, serrano and pasilla chiles, cayenne, garlic and salt to
taste. Stir, then add the tomato puree, tomatoes, water and ale. Bring to a
complete boil and reduce the heat to a simmer. Simmer until the meat is tender,
about 1 hour. Stir in the reserved bacon. Sprinkle with lemon juice just before
serving.