In a small bowl, whisk together the coconut aminos, honey, minced ginger, and minced garlic to create the bulgogi sauce.
In another small bowl, toss the sliced cucumbers with rice vinegar and a pinch of sea salt; let them sit to lightly pickle while you cook.
Heat a large skillet over medium-high heat and add the ground beef, breaking it apart with a spatula until browned and fully cooked through.
Drain any excess liquid from the skillet, then pour in the prepared bulgogi sauce and simmer for 2 minutes until the sauce coats the beef in a glossy glaze.
Remove the beef from the pan and quickly sauté the baby spinach in the remaining pan juices for 1 minute until just wilted.
Assemble your bowl by placing the warm cooked brown rice at the base, topped with the glazed beef, wilted spinach, shredded carrots, and pickled cucumbers.
Garnish the dish with a drizzle of toasted sesame oil, sliced green onions, and the remaining black pepper before serving.