As decadent as it gets, this cheesy, beefy, buttery pastry roll will be the star of the show at your next gathering. Don’t be intimidated by the braiding – we promise it’s simple!
Add cooked and cooled ground beef to a large bowl along with spinach, cheese and macaroni and cheese. Set aside.
Preheat oven to 400ºF. Line a large baking sheet with parchment paper.
To place puff pastry sheet in the centre of prepared baking sheet. In the middle of the pastry, form prepared filling into a (approximately) 3×6-inch x 2-inch-high rectangle.
On long sides of pastry, make 8 slices (flaps for braiding).
Tuck top and bottom ends of pastry over filling. Starting at the top, cross two flaps on opposites sides. Repeat with remaining flaps, making sure there are no large gaps where filling can be seen (a few holes are okay). Tuck in any stray scraps.
Keep the roll straight or using your hands, gently curve roll.
Brush top of roll with mustard and sprinkle with salt.
Bake for 25 to 30 minutes, until filling is bubbling and pastry is golden brown. Let rest for 5 to 10 minutes (so filling doesn’t all fall out when slicing).
Using a large flat spatula, transfer roll to a serving platter. Slice and serve with tomato sauce for dipping.