Slice the pork tenderloin into very thin, bite-sized strips to mimic the texture of pork belly and season with sea salt and black pepper.
In a small glass bowl, whisk together the gochujang, coconut aminos, minced fresh ginger, minced garlic, and red pepper flakes until smooth.
Heat the toasted sesame oil in a large cast-iron skillet over medium-high heat until it begins to shimmer.
Add the pork strips to the hot skillet in a single layer, searing for 2-3 minutes per side until deeply browned and crispy on the edges.
Pour the gochujang sauce mixture over the pork and toss continuously for 60 seconds until the glaze is thick, sticky, and fragrant.
In a separate non-stick pan, sauté the cauliflower rice over medium heat for 4 minutes until tender yet slightly firm.
Transfer the cauliflower rice to a serving bowl and top with the glazed pork strips and sliced cucumbers.
Garnish the bowl with toasted sesame seeds and thinly sliced green onions before serving warm.