Dice the chicken breasts into bite-sized pieces and chop the onion and garlic.
In a skillet over medium heat, melt the unsalted butter. Add the chopped onion and cook until translucent, about 5 minutes. Add the minced garlic and grated ginger; cook until fragrant for 1-2 minutes.
Stir in the curry powder and cook for about one minute to deepen the flavors.