Brown the beef

• Heat a pan and brown the ground beef quickly.
• Season with salt and pepper.

Add the vegetables

• Add the sliced green onions, diced carrot and green bell pepper.
• Stir in the minced garlic clove and the tomato paste.

Build the filling

• Add the frozen peas, fresh thyme, rosemary and the whole sprig of oregano.
• Pour in the Worcestershire sauce and the beef stock.
• Thicken with cornstarch and add a sprinkle of sugar.

Pressure cook the potatoes

• Pressure cook the peeled potatoes until tender.

Mash the potatoes

• Mash the potatoes with the butter, a splash of milk, the parmesan and the egg yolk.

Assemble the pie

• Spread the meat filling in a baking dish.
• Top with the mashed potatoes and more grated parmesan.

Bake

• Bake until the top is golden.