Preheat the oven to 400 degrees.

Place a large piece of aluminum foil on a sheet tray. Slice slits into the baguette but do not slice all the way through. Place the baguette on top of the aluminum foil. 

In a microwave safe jar add the butter and garlic. Microwave for 15 seconds at a time until the butter is melted. Once melted, mix in the salt, Parmesan and parsley. 

Using a small spoon or spatula, spread the butter mixture into each slice of baguette. With the leftover butter, pour over the top of the baguette. Tightly wrap the baguette in the foil and place in the oven for 20 minutes. 

After 20 minutes, remove the baguette and turn the oven to broil. Unwrap the baguette so the top is visible. Place the baguette back in the oven and cook until browned, about 5 minutes.