Prepare all ingredients as listed, slicing vegetables and setting garnishes aside.
Cook the rice according to package instructions. Season with salt and pepper.
Heat a large skillet over medium heat and add avocado oil. Add chicken sausage and cook until browned and heated through, then remove from the skillet and set aside.
In the same skillet, add yellow onion and bell peppers and sauté until softened. Add garlic, ginger, and the white parts of the scallions and cook until fragrant.
Add spinach and cook just until wilted. Return sausage to the skillet and stir to combine, then remove from heat.
In a separate pan over medium heat, melt butter and cook eggs to desired doneness.
Portion the rice, kimchi, sausage, spinach, onions, peppers, eggs, avocado, scallions, and black sesame seeds if using.
Heat water until hot but not boiling. Add matcha green tea powder and whisk until smooth and frothy.
Serve the kimchi breakfast bowl with fruit and matcha green tea.