Update: I found this. I'm curious to try it.
1 loaf of sourdough bread, sliced in half
1 stick butter
2 teaspoons freshly chopped garlic
1 pkg. (1/3 cup) Kraft Macaroni and Cheese Powder Packet
1/4 cup Parmesan cheese
Melt butter, sauté garlic and let set overnight at room temperature. Melt it down again, brush evenly over loaves. Take Kraft Macaroni and Cheese powder. Add in Parmesan. Coat the bread w/ a thin layer to cover. Bake in oven at 350 degrees for 5 minutes, then Broil bread for 30 seconds, rotating evenly. Slice and serve.