Pat the flank steak dry and season both sides evenly with smoked paprika, sea salt, and black pepper.
Preheat a grill or heavy cast-iron skillet over medium-high heat and add the avocado oil.
Place the steak in the pan and sear for 4-5 minutes per side for medium-rare, or until it reaches your desired level of doneness.
Remove the steak from the heat and let it rest on a cutting board for at least 5 minutes to lock in the juices.
While the steak rests, finely mince the fresh parsley, cilantro, and garlic clove.
In a small bowl, whisk together the minced herbs, garlic, red wine vinegar, extra virgin olive oil, and red pepper flakes to create the chimichurri.
Add the asparagus to the hot skillet or grill and cook for 3-4 minutes until tender-crisp and slightly charred.
Slice the rested steak thinly against the grain and serve alongside the asparagus, drizzling the fresh chimichurri generously over the meat.