I cut the bread into portion-size lengths of about 6 inches or 15 cm, then slice in half lengthways. One pack of softened butter to 2 fat cloves of crushed garlic (more if small) plenty of chopped parsley added, mash well together, butter the pieces liberally.
Can be frozen in pairs stuck together and unstuck once thawed. They do freeze well.
Bake butter side up in a hot oven until just golden and crispy, about 10 minutes.
I used to make it by almost-cutting crossways into lots of small slices, but the above method is much less of a faff.