If you are making this with prosciutto, cut your prosciutto into peices and add them to a pan on medium heat with a little bit of oil. Once they become crispy, remove them from heat and set aside.
Heat a little oil or butter in a pan. Scramble eggs and then remove from heat and set aside.
Chop up your asparagus and onions.
Add 1 tbsp butter to a large saute pan or wok. Once it heats up, add the majority of your onions and your asparagus. Cook for 5 minutes.
Add the rest of the butter to the pan, followed by the sesame oil, your rice and peas. Mix well.
Add the soy sauce to the pan and mix well. Once it is fully incorporated, let it heat up without moving it so that the rice gets a little crispy.
Once rice crisps up in a few areas, add your scrambled eggs and prosciutto back into the rice and mix.
Serve and top with remaining green onions.