In a small bowl, whisk together the tamari, grated pear, minced ginger, minced garlic, and red pepper flakes to create the bulgogi marinade.
Place a large skillet over medium-high heat. Add the ground beef and cook, breaking it into small crumbles with a spatula, until it is fully browned and no pink remains.
Pour the prepared marinade over the beef. Reduce the heat to medium and simmer for 3-5 minutes, stirring occasionally, until the sauce has thickened and beautifully glazed the meat.
In a separate non-stick skillet, combine the cauliflower rice and cooked brown rice. Add the sesame oil and sauté for 4-5 minutes until the cauliflower is tender and the grains are well-incorporated.
Lightly steam the shredded carrots and fresh spinach in a steamer basket or microwave with a splash of water for 2 minutes until just tender.
To assemble, divide the rice blend into a bowl. Top with the glazed bulgogi beef, steamed carrots, spinach, and a scoop of kimchi.
Garnish the bowl with thinly sliced green onions and toasted sesame seeds before serving.