Chop off 1/4 top of the pumpkin so it's like a bowl
Clean out the pumpkin and reserve seeds to roast at later date
Heat chirizo for 3-5 minutes in a large frying pan
Add chopped serrano pepper, can of chilies, cumin and cayenne pepper and cook for 2 minutes
Add flour and mix in then cook for 2 minutes
Add broth and bring to a boil then heat to medium
Add cheeses and cook for 3 minutes until melted and creamy
Fill pumpkin with cheese mixture ( you may have extra)
Place filled pumpkin in a baking dish and fill up to one inch around the pumpkin with boiling water
Loosely cover with aluminum foil and bake for 1 hour and 20 minutes
Remove foil and continue baking for 20-25 minutes until golden brown
Remove from dish and place on serving platter and garnish with cilantro. Serve immediately with tortilla chips