Cook your rice in a rice cooker or on the stovetop.
Add the ingredients for the spam sauce into a small bowl and set aside. Prepare the sriracha mayo in a separate bowl or in a squeeze bottle and set that aside as well.
Add oil to a medium pan and fry eggs sunny side up, until the whites are cooked and yolk is still runny. Place cooked eggs on a plate and set aside.
Add a drizzle of oil to the same pan and cook your spam under medium low heat until each spam cube is golden on all sides (about 5 minutes).
Add spam sauce to the pan and continue to mix until the spam is evenly coated and the sauce has thickened (about 2-3 minutes). Turn off the heat and set aside.
To assemble your bowl, add about 1.5 cups of rice to a bowl and use your hands to crumble 4 small sheets of nori over it. Top with cooked spam and egg, then drizzle with sriracha mayo.
Garnish with chopped green onion slices before serving.