Cut, peel and remove stems from yuca root (or use a frozen bag of already cut yuca).
Add to a large pot of water and salt and boil for about 30 mins or until fork tender.
In a medium pan on medium high heat add Achiote oil and lightly brown your meat.
Add in your seasonings, sofrito, and veggies and sauté for another 5 minutes.
Add in your tomato sauce and bring to a simmer.
Add in your bay leaf; cover and cook for about 20 mins on low heat.
Drain your yucca water then add in butter and milk and mash/blend till smooth with no clumps.
Add salt to taste.
Grease a 12x8 baking pan with butter and add a nice layer of mashed yucca.
Then, add some mozzarella cheese and layer with your meat.
Layer your meat with more cheese then top with more mashed yucca. I wet my hands to help spread the top layer.
Lastly, add a layer of the Mexican cheese. Bake in a preheated oven at 400 degrees for about 20-25 mins.