In a small bowl, whisk together the coconut aminos, honey, minced garlic, grated fresh ginger, and red pepper flakes to create the bulgogi sauce.
In a separate small bowl, toss the sliced cucumbers with the rice vinegar and a pinch of sea salt, then set aside to quick-pickle while you cook the beef.
Heat a large non-stick skillet over medium-high heat and add the ground beef, seasoning it with the remaining sea salt and black pepper.
Cook the beef for 5-7 minutes, breaking it into small crumbles with a wooden spoon, until it is browned and fully cooked through.
Pour the prepared bulgogi sauce over the beef and stir for 1-2 minutes until the sauce reduces into a thick, glossy glaze that coats the meat.
Remove the beef from the skillet and set aside; in the same hot pan, add the fresh spinach and sauté for 1 minute until just wilted.
Assemble the bowl by placing the warm cooked brown rice at the base and topping it with the glazed beef, sautéed spinach, shredded carrots, and the pickled cucumbers.
Drizzle the entire bowl with the toasted sesame oil before serving for a rich, aromatic finish.