Heat the oil in a large nonstick saucepan pan over medium heat.
Add the onions and garlic then saute stirring occasionally, cooking until soft.
Remove and set aside.
Add sliced beef to pan, add a pinch of Hawaiian salt, and saute to medium rare, stirring occasionally. Turn off heat, remove beef and set aside with the onion and garlic.
Add peanut butter, shoyu and sugar to saucepan. Start heating on medium-high until peanut butter melts, then reduce heat to medium low. Stir with wooden spoon to meld/mix ingredients for 1-2 minutes.
Return beef and onions to pan. Stir to adequately coat the steak evenly. Turn off fire, let rest 1-3 minutes.
Serve over white rice. Garnish with green onion. Enjoy.