You can use leftover roast chicken or even turkey in this recipe. But add them once the leek and carrots are cooked.
I prefer puff pastry to make these pies, but you can choose short crust pastry to line the tins.
You can replace dried rosemary with dried thyme or chives.
Don’t hesitate to add your favorite vegetables to these pies to make them more nutritious like zucchini, corn, mushrooms or green peas