Put the chilies in a bowl and pour boiling water over them to cover. Let them sit for 10 minutes.
Meanwhile, heat 1 teaspoon of oil in a pot and add the onion. Cook for 5 minutes. Add the garlic and cook for 1 minute.
Stir the mixture all the time as it cooks.
Next stir in the tomatoes and broth and simmer for 10 minutes.
Remove the chilies from the water, cut them in half and discard the stems and seeds.
Put them in a blender with the tomato mixture and puree until smooth. Add salt and pepper to taste.
Preheat the oven to 325 degrees F.
Heat the rest of the oil in an ovenproof pot.
Season the beef cubes with salt and pepper, and sear in the meat for 5 minutes or until browned all over.
Pour the sauce on top, cover the pot.
bake for 3 hours or until tender.
Enjoy!