Make this about 1 hour before using. In a small saucepan heat the oil over a low heat. Add the garlic and stir constantly so as not to burn (Burning garlic is quite bitter). When the aroma is evident, add the butter and melt down.
Immediately pour into a bowl then add the herbs and parsley. Stir well, cover and set aside. The butter will set.
When ready to use, preheat a grill to medium heat. Slice the rolls or French bread in half. Stir the butter and spread evenly over the 4 halves. Place on a grill tray and toast for about 3 minutes being careful not the burn the bread. Serve immediately.
Make the garlic butter a couple of days in advance. Bring the butter to room temperature about half an hour before using.