--Fire-Roasted Red Sauce--
6 to 8 plum tomatoes (about 1 1/2 pounds)
1 red bell pepper
1 poblano pepper
1 small red onion, sliced into 1/2-inch wedges
1 red finger chile
3 garlic cloves, whole
Olive oil, as needed
Salt and freshly ground pepper, to taste
2 tbsp. tomato paste
2 tsp. oregano
2 tsp. ground cumin
1/4 tsp. ground cloves
1 tbsp. brown sugar
1/2 cup beef stock
1/4 cup olive oil
Handful cilantro leaves

Beef & Chorizo Filling
2 tbsp. olive oil
1 1/4 pound ground beef
2 raw chorizo sausages, removed from casing
1/4 cup beef stock or water
Salt and freshly ground pepper, to taste
Handful green olives, sliced (optional)

Assembly
2 cups grated mozzarella cheese
10 (6-inch to 7-inch) corn tortillas
3 to 4 ounces feta, crumbled
Lime wedges, for serving
Sliced onion, for serving
Sour cream, for serving
Chopped green onions, for serving
Chopped tomatoes, for serving
Sliced black olives, for serving
Pickled jalapenos, for serving
Sliced avocado, for serving