In a large skillet, brown the ground beef. Remove from the pan and set aside.
Clean the pan and over medium heat melt the butter with olive oil and add the fresh thyme.
Next add the Spice World Easy Onion and Minced Garlic. Add the sugar and cook until the onions begin to brown. This may take 8-10 minutes. If they begin to brown to fast lower the heat. They should be a golden brown, but not burnt.
Sprinkle in the flour and mix until combined. Cook stirring for about a minute.
Add the beef stock and cook stirring until the mixture thickens.
Add the ground beef and mix until combined. Allow the mixture to cool or make the day before and refrigerate.
Mix in the parmesan and gruyere cheeses.
Working with one piece of puff pastry at a time, unfold the pastry and gently roll over with a rolling pin to smooth it out.
Cut 9 3” circles from one sheet.
Mix the egg yolk and 2 teaspoon of water to create the egg wash.
Brush a puff pastry round all over with egg wash and place 2 teaspoons of the filling in the center. Elongate the filling so it will be easier to close the sides.
Fold the pastry in half so the edges meet, covering the filling. Pinch the edges well and seal with the tines of a fork. Repeat with the remaining circles and then with the second piece of puff pastry.
Place the turnovers on a parchment lined baking sheet. All 18 should fit on a half sheet pan.
Brush the turnovers with the egg wash and sprinkle with a mixture of the finely grated parmesan and fresh thyme.
Preheat your oven to 425° and place the turnover in the freezer for 30 minutes.
Place the turnovers in the oven and reduce the temperature to 400°
Bake for 20-25 minutes or until golden brown and the pastry is puffed and no longer looks shiny.
Serve hot and enjoy!!