Prepare rice prior, or if not available: prepare it in your rice cooker when you begin.
Marinate the pork slices with your chosen marinade, I chose kalbi sauce.
Julienne your carrots, and wash the spinach. Heat up a pot of water.
Afterwards, pan fry the marinated pork slices on a pan with sesame oil.
While this is frying, boil the carrots for 5 minutes, drain afterwards. Make sure you stir the pork belly slices, they should be browning shortly.
Next, boil the watercress for 3 minutes, drain. Remove pork slices when cooked through/browned.
Using the pan from the pork slices, crack your 3 eggs into it. Cook until no longer runny. Flip once.
After the eggs are done, remove from the pan, and cut into strips. Place everything into prep area. Add sushi vinegar to your finished rice if you are adding vinegar.
Assemble the ingredients all together. Roll the nori (can just do by hand), and cut!