Demi-Glace
A 48–72 hour reduction, done properly
The demi-glace in the braise is this preparation.
Oxtail, short rib and shin, braised in merlot and set in their own gelatin, in a sealed puff pastry case.
The South African garage pie, made as a full pie in a glass dish. Three collagen-rich cuts are braised for 3.5 h. The braising liquid sets to a firm jelly overnight, so the filling goes into the pastry cold and solid. A blind bake, an egg-white seal and a layer of breadcrumbs keep the base crisp. Black pepper goes in twice: at the sear and into the finished filling. Paper strips under the pastry lift the whole pie out of the dish.
First record. Written from the cook with 1 large oxtail, 1 kg short rib, 2 shin slices and one bottle of merlot reduced into the braise, with Edeka puff pastry in a glass dish.
Heat the oven to 150 °C.
Dry the short ribs, oxtail and shin fully with paper towel.
Season all sides with the salt and 7 g of the black pepper.
Dust the meat lightly with the flour.
Sear the meat in batches, 3 to 4 min on each side, until dark brown. Do not crowd the pot.
Remove the meat. Lower the heat to medium.
Add the brandy. Scrape the base of the pot. Boil for 30 seconds.
Put the meat back in the pot. Add the stock, tomatoes, Worcestershire sauce, demi-glace, thyme and bay leaves.
Add water until the liquid is two thirds of the way up the meat.
Bring to a bare simmer. Cover with a tight lid.
Braise in the oven.
Test the meat. A fork must go in with no resistance and the bones must move freely. If not, braise for 30 min more.
The thickest piece reads 93 to 96 °C.
Lift the meat onto a board. Remove all the bones. Freeze the bones for stock.
Pull the meat into pieces of 20 to 30 mm with two forks.
Strain the liquid through a fine-mesh sieve.
Refrigerate the meat and the liquid in separate containers overnight.
The liquid must set to a firm jelly under a cap of fat.
Lift the fat cap off the jelly. Keep it: it is beef tallow.
Melt the jelly in a saucepan. Reduce it by half until it coats a spoon.
If it is too thin, mix the cornstarch with 15 ml cold water. Stir it in. Simmer for 2 min.
Taste. Adjust the salt and the Worcestershire sauce.
Fold in the meat and the remaining 7 g of black pepper.
Cool, then refrigerate. The filling must hold its shape on a spoon.
Butter the glass dish. Lay two crossed strips of baking paper in it, with overhang on all sides.
The paper strips lift the baked pie out of the dish.
Overlap two pastry sheets by 20 mm. Brush the overlap with water. Press the seam and roll over it lightly.
Join sheets until the pastry covers the base and sides with 30 mm overhang. Chill for 10 min.
Roll the pastry to 3 to 4 mm. Line the dish without stretching the pastry.
Put the seams across the centre of the base, not on the sides.
Freeze the lined dish.
Heat the oven to 220 °C.
Line the pastry with crumpled baking paper. Fill with baking beans. Push them against the sides.
Bake on the lowest shelf.
Remove the beans and the paper. Prick the base 6 to 8 times with a fork.
Bake until the surface is dry and matte.
Sprinkle the breadcrumbs evenly over the base.
Spoon in the cold filling. Mound it slightly at the centre.
Join and roll pastry for the lid, with a 20 mm overhang.
Brush the rim of the base with water. Lay the lid on top. Press the edges together.
Fold the lid edge under the base edge. Crimp all round with a fork.
Cut 4 slits and a centre hole in the lid. Put a small foil chimney in the hole.
Beat the egg yolk with the milk. Brush it over the whole lid.
Freeze the pie for 15 to 20 min.
Put the dish on a baking sheet at room temperature. Do not use a hot sheet.
Bake on the lowest shelf.
Lower the oven to 180 °C. Move the pie to the middle shelf. Bake until deep golden.
Look at the base through the glass. It must be golden, not pale.
Rest the pie.
Lift the pie out with the paper strips. Cut with a serrated knife.
The assembled pie goes from the freezer into a 200 °C oven. A sudden change in temperature can crack glass.
Pyrex sold in Europe is borosilicate glass, which tolerates this well. A soda-lime glass dish is less tolerant.
Freeze for 15 to 20 min only. Do not freeze the dish solid. Put it on a baking sheet at room temperature, never on a hot sheet or a wet surface.
Not tried. A butter and lard shortcrust base takes up less water than puff pastry and holds a heavy filling better. Keep puff pastry for the lid only. Suggested base: 225 g plain flour, 60 g butter, 60 g lard, 1 egg yolk, 45 ml ice water.
The pepper steak pie sold at South African petrol stations. This version must have pastry on all sides and must come out of the dish whole.
A 48–72 hour reduction, done properly
The demi-glace in the braise is this preparation.
What is actually happening in the dish, and why the techniques work.
Oxtail, shin and short rib all hold a lot of collagen. Collagen converts to gelatin slowly from 70 °C and much faster above 80 °C. The long braise dissolves it into the liquid.
Below approximately 40 °C, dissolved gelatin sets to a gel. So the chilled liquid sets to a firm jelly, and the fat rises and sets as a cap that lifts off in one piece.
The cold filling goes into the pastry as a solid. A solid filling gives off less steam and no free liquid while the base sets. In the oven the gel melts again and becomes the gravy.
This is why the filling must be cold, not warm, when the pie is assembled.
Puff pastry takes up water fast because it is thin layers of dough and butter. The base needs three barriers.
Blind bake. Heat drives water out of the pastry and sets the starch into a rigid structure before the filling touches it.
Egg white. Egg white proteins set from approximately 62 °C into a thin film that water does not easily cross. Brush it on the hot base so it sets at once.
Breadcrumbs. Dry crumbs take up the first liquid that meets the base.
The frozen assembled pie then goes into a hot oven on the lowest shelf. The butter in the pastry is still solid, so its water turns to steam and lifts the layers. The base gets direct heat before the filling warms enough to give off steam.
Reducing the wine by half in the open pot boils off most of the alcohol and concentrates its acid, sugar and tannin. In the closed braise the alcohol cannot leave, and a raw wine taste stays in the gravy.
Wine tannins bind to protein. Against the fat and gelatin of the filling they read as structure, not as bitterness.