Cube the pork tenderloin and pork belly into bite-sized pieces.
Season the pork cubes evenly with garlic powder, ginger powder, sea salt, and black pepper.
Place the pork belly in a cold skillet and turn the heat to medium-high, rendering the fat until the pieces are crispy.
Add the pork tenderloin to the skillet and sear for 5-6 minutes until cooked through and golden brown.
In a small bowl, whisk together the gochujang, tamari, and rice vinegar.
Pour the gochujang mixture over the pork and stir for 1 minute until the sauce thickens into a glossy glaze.
In a separate pan, sauté the cauliflower rice with sesame oil for 3-4 minutes until tender.
Divide the cauliflower rice into bowls and top with the spicy pork, sliced cucumber, sliced green onions, and sesame seeds.