Wash your beef tongue under cold water and pat dry

Line the bottom of your crock pot with your onion, garlic, and bay leaves

Lay the tongue on top and generously season with salt and pepper

Add as much water as you need to completely submerge the tongue in water

Cover and cook on low for 8 hours

Remove from crock pot and remove the skin of the tongue

Shred the beef and serve with the sauce below

In a sauce pan over medium heat, saute your onions, garlic, red pepper, and serrano chile until the onions are translucent

Add in all remaining ingredients and stir well

Reduce heat to low and simmer for 30 minutes

You can leave the sauce chunky as is or transfer to a blender and make more of a smooth sauce, the option is yours

Serve over your shredded tongue and enjoy