If butter is not softened, place it in a small microwave-safe bowl and microwave for 3-8 seconds until it has softened somewhat. Add garlic, dijon, just half of the parsley, and some salt and pepper to the butter. Mix until combined.

Pat steak dry and season with some salt and pepper.

Heat oil in a skillet over medium-high heat. Cook steak until it reaches desired doneness, about 3-5 minutes per side. Transfer steak to a cutting board to rest.

Slice steak and serve topped with herb butter and remaining parsley.