In a small bowl, whisk together 1 tablespoon of olive oil, balsamic vinegar, garlic powder, dried oregano, dried thyme, sea salt, and black pepper to create the marinade.
Place the flank steak in a shallow dish or resealable bag, pour the marinade over it, and ensure it is evenly coated. Let it marinate for at least 30 minutes at room temperature or up to 4 hours in the refrigerator.
Preheat your grill or grill pan to medium-high heat.
Toss the asparagus spears with the remaining 0.5 tablespoon of olive oil.
Place the steak on the hot grill and cook for 4-5 minutes per side for medium-rare, or until it reaches your desired level of doneness.
During the last 5 minutes of grilling the steak, place the asparagus on the grill and cook until tender and slightly charred.
Remove the steak from the grill and let it rest on a cutting board for 5-10 minutes to lock in the juices.
Slice the steak against the grain into thin strips.
Serve the sliced steak over the warm cooked quinoa with the grilled asparagus on the side, garnished with freshly chopped parsley.