Slice the pork tenderloin and pork belly into very thin, bite-sized strips.
In a small mixing bowl, whisk together the gochujang, tamari, rice vinegar, honey, minced garlic, and grated ginger to create the glaze.
Heat a large skillet over medium-high heat. Add the pork belly first, cooking until the fat renders and the pieces become golden and crispy.
Add the pork tenderloin strips to the skillet and sear for 3-4 minutes until cooked through and slightly browned.
Pour the gochujang glaze over the pork and toss continuously for 1-2 minutes until the sauce thickens and coats the meat in a glossy finish.
Remove the pork from the pan and set aside. In the same pan, add the sesame oil and quickly sauté the cauliflower rice and spinach for 2 minutes until the spinach is wilted.
Assemble the bowl by layering the cauliflower rice and spinach at the base, then topping with the spicy glazed pork and the kimchi.
Garnish with thinly sliced green onions and toasted sesame seeds before serving.