Cook beef until it's tender
Chop bacon into small pieces and cook in a nonstick pan until well done (not too crispy)
Peel the green tomatoes; cut them in half. Blend well.
Once meat is ready add the sauce. Make sure you use a colander so the seeds don't end up in your meat.
Add bacon to the meat and sauce
Chop onions and remove the first layer. Cook the onion in the bacon fat until nice and tender. Once ready you can strain them for a bit. The quality of onions is optional
Add cooked onions to the meat, bacon and sauce
Fry some tortillas in the bacon fat and drain them for a bit.
Once everything boils it's ready to serve
Eat it with rolled up tortillas
Some people add boiled beans (frijoles de la hoya) also, it really up to you.