Soften the butter in the microwave about 15 seconds. Put it in a small bowl. Peel the garlic and finely mince it. Set it aside. Finely chop about 1/2 a bunch of parsley so it's about 1 cup full - slightly packed. Add the garlic and parsley to the butter and mix well.
Spread the garlic, parsley, butter mixture evenly on both halves of a loaf of crusty Italian or French bread sliced in half lengthwise. Sprinkle the bread with grated cheese. Broil for about 10 minutes or until golden brown. Serve immediately.
You can also use this mixture as the base for a sautee of any vegetable like zucchini, mushrooms, cauliflower, broccoli, etc. If you do make broccoli or cauliflower, you should steam them first, then place them in a saute pan with the butter mixture for a few minutes to finish them.