Slice the pork tenderloin and pork belly into small, bite-sized cubes to ensure even cooking and caramelization.
In a small mixing bowl, whisk together the gochujang paste, coconut aminos, minced fresh ginger, and minced garlic.
Toss the pork cubes in half of the gochujang mixture and let them marinate for at least 10 minutes.
Heat the sesame oil in a large skillet or wok over medium-high heat.
Add the pork belly cubes first, cooking for 3-4 minutes until the fat renders and the edges become crispy.
Add the pork tenderloin to the skillet and sear for another 5-6 minutes until all the pork is cooked through and deeply browned.
While the meat is cooking, thinly slice the cucumber and toss with rice vinegar in a small bowl to lightly pickle.
Steam or lightly sauté the cauliflower rice in a separate pan until tender and hot.
Assemble the bowls by placing a base of cauliflower rice at the bottom, followed by the spicy pork, kimchi, and pickled cucumbers.
Drizzle the remaining gochujang sauce over the top and garnish with sliced green onions and sesame seeds.