01 - Heat olive oil in a large pot over medium-high heat. Add beef and brown on all sides for approximately 5 minutes. Remove beef and set aside.
02 - In the same pot, sauté onion until translucent, about 4 minutes. Add garlic, cumin, paprika, oregano, salt, and pepper. Cook for 1 minute until fragrant.
03 - Return beef to the pot and add beef broth. Cover and simmer on low heat for 1 hour until beef is tender and easily shredded. Shred beef with two forks and return to the pot with some juices.
04 - Preheat broiler. Arrange tomatillos, poblano peppers, and jalapeño on a baking sheet. Broil for 6-8 minutes, turning once, until charred and softened.
05 - Transfer broiled vegetables to a blender. Add cilantro, garlic, chicken broth, salt, and lime juice. Blend until completely smooth.
06 - Preheat oven to 375°F.
07 - Warm tortillas slightly to prevent cracking. Spread ½ cup of green sauce evenly over the bottom of a 9x13-inch baking dish.
08 - Fill each tortilla with approximately 2-3 tbsp of shredded beef and a sprinkle of cheese. Roll up tightly and place seam-side down in the prepared dish.
09 - Pour remaining green sauce evenly over the assembled enchiladas. Top with remaining cheese.
10 - Bake for 20-25 minutes until cheese is completely melted and sauce is bubbling.
11 - Top with sour cream, fresh cilantro, and diced red onion before serving.