Thinly slice the flank steak against the grain into bite-sized strips.
In a medium bowl, whisk together the coconut aminos, honey, minced garlic, grated ginger, sea salt, and black pepper.
Add the steak to the marinade and toss to coat thoroughly, letting it sit for 15 minutes to absorb the flavors.
Heat the toasted sesame oil in a large cast-iron skillet over medium-high heat until shimmering.
Add the marinated steak in a single layer and sear without moving for 2 minutes to develop a deep brown crust.
Flip the steak and cook for another 1-2 minutes until just cooked through, then remove from the skillet and set aside.
In the same skillet, add the cauliflower rice and sauté for 3-4 minutes until tender and slightly golden from the residual pan juices.
Divide the cauliflower rice into bowls and top with the bulgogi beef and a generous portion of kimchi.
Garnish with sliced green onions and toasted sesame seeds before serving.