Preheat the oven to 180 °C.
Chop the celery, carrots and onions very finely or blitz in a food processor until very fine.
Fry the celery, carrots, onions, garlic and jalapeno in the oil in a Dutch Oven or a heavy-based pot with a tight-fitting lid for 3 - 5 minutes.
Add the taco spice, smoked paprika and salt and stir-fry until fragrant.
Add the shot of Tequila and stir, allowing the alcohol to evaporate.
Add the tomatoes, breaking up the pieces into smaller bits if you are using whole tomatoes.
Add the drained beans and bring the contents to a simmer.
Add the beer and get the mixture to a slow boil again.
Put the lid on the pot and cook in the oven for an hour.
Remove from the oven and correct the seasoning adding more salt if necessary.
Serve with chopped cilantro on Nachos, as a vegetarian tortilla filling or as a side dish.