In a small bowl, whisk together the gochujang, tamari, honey, and grated fresh ginger to create the spicy glaze.
Season the cubed chicken breast with sea salt and black pepper.
Heat toasted sesame oil in a large skillet or wok over medium-high heat.
Add the chicken to the skillet and sear until golden brown and cooked through, approximately 5-7 minutes.
Remove chicken from the pan and set aside; add the broccoli florets and sliced red bell pepper to the same pan.
Sauté the vegetables until tender-crisp, then stir in the minced garlic and cook for 30 seconds until fragrant.
Return the chicken to the pan and pour the gochujang glaze over the mixture, tossing to coat evenly until the sauce thickens.
In a separate pan or microwave, steam the cauliflower rice until tender and fluffy.
Serve the spicy chicken and vegetable stir-fry immediately over the bed of cauliflower rice.
Garnish with thinly sliced green onions and sesame seeds for added texture and flavor.