Combine the crushed garlic, garlic powder, butter, and oil in a saucepan and heat over low for several minutes, until incorporated. Set aside.
Split loaf in half, lengthwise, and place on foil-lined baking sheet. Brush bread generously with garlic butter mixture. Bake bread 5-10 minutes, or until lightly golden. Remove bread and sprinkle evenly with cheese and parsley. Adjust oven to broil, and broil bread about 1 minute, or just until desired level of golden brown is achieved and cheese is melted. Watch carefully and remove bread as soon as it looks done.
Cut into thick slices, wrap in clean cloth, and serve immediately.
Notes
For the best results, use a thick, crusty loaf of bread like a rustic Italian or French loaf. The texture and density of this type of bread hold up well to the garlic butter and cheese, and it provides a satisfying chewiness.
Fresh garlic is key in this recipe. Don't be tempted to use pre-minced garlic from a jar; the flavor won't be as vibrant. Take the time to crush your own garlic cloves for the best garlic cheese bread.
Crushing the garlic rather than mincing it gives the bread a more intense and rustic garlic flavor. This also prevents the garlic from burning in the oven, as larger pieces can withstand the heat better.