The butter should be very soft so you can beat it.
Combine all herbs and lemon juice with butter, spice with salt and pepper and other ingredients that you choose.
Mix very well, until smooth.
Place in fridge if you want to form a roll. Otherwise fill the butter in a small bowl and keep in fridge.
When butter is firm enough form a roll, wrap it in foil or plastic wrap and place in fridge, then cut into slices. With an ice cream scoop you can make small balls.
Serve one slice of herb butter on each steak.