Heat the oven to 400 degrees Fahrenheit and line the baking sheet with Reynolds Wrap® Heavy Duty Foil to keep the sauce from spilling out and burning onto the pan.
Roll out the puff pastry dough into a square and cut out 4 smaller squares. Set aside on the foil-lined baking sheet in the fridge.
1 Sheet Frozen Puff Pastry
In a pot over medium heat, add the butter and cook until melted.
2 Tablespoons Butter
Stir in the garlic and cook until tender, about 1 minute.
2 Cloves Garlic
Using a wooden spoon, stir in the flour, ground mustard and nutmeg. Continue to stir for about a minute then slowly add the milk and bring to a simmer for 3 minutes or until thickened.