mix the melted butter, olive oil, onion, garlic, dijon mustard, poppy seeds, pepper and parsley in a bowl.
cut the bread into cubes with x slices without cutting all the way through the bottom crust.
pour the butter-onion garlic mixture carefully into those x cracks using a small spoon and over the top of the bread. Fill those delicious cracks with the grated cheese. (it seems like a lot of work and trouble but it?s all worth it. Yes.)
wrap the entire loaf with foil, sealing the sides properly and bake for 15-20 minutes. Remove from the oven and unwrap. Bake for another 10 minutes until the cheese is melted and gooey.