01 - Preheat oven to 375°F.
02 - Heat olive oil in a large skillet over medium heat. Add onion and cook until softened, about 3 minutes. Stir in garlic and cook for 1 minute more.
03 - Add beef along with cumin, chili powder, smoked paprika, salt, and black pepper. Sear the beef on all sides for approximately 5 minutes.
04 - Pour in beef broth, cover skillet, and reduce heat to low. Simmer until beef is tender and can be shredded easily, about 25 minutes. Add more broth if necessary.
05 - Remove beef from skillet and shred with two forks. Return shredded beef to skillet and combine with cooked onion and spices.
06 - Warm tortillas until pliable to prevent tearing when rolling.
07 - Spread 1/2 cup of green enchilada sauce evenly on the bottom of a 9x13-inch baking dish.
08 - Divide shredded beef among the tortillas, roll them up, and place seam-side down in the baking dish.
09 - Pour remaining green enchilada sauce over the rolled tortillas, then sprinkle shredded cheese evenly on top.
10 - Bake uncovered for 20 minutes, or until the cheese is melted and bubbly.
11 - Garnish with chopped cilantro and sliced jalapeño. Serve with sour cream if desired.