Variations for leek crumble

• You could use all fresh or all dried cranberries, or swap out the cranberries for a different sharp fruit, preserved lemon perhaps.
• Add chopped chicken, ham or chunks of sausage
• Add cooked mushrooms, a handful of peas, chopped and cooked carrot, swede or parsnip
• Include some herbs. Leeks go particularly well with chervil, parsley, sage, thyme or basil.
• Add some mustard - Dijon or grainy mustard
• Add a bit of cooked rice to the leek mixture
• Change the leeks to onions.
• Change the walnuts to salted peanuts, salted cashews, chopped hazelnuts or chopped almonds
• Add some cheese to the topping
• Top the leek base with mashed potato, or a  mix of mashed root veg
• Put the leek mix in a pastry case and top with breadcrumbs, or in a double shortcrust pie, or roll in a puff pastry roulade
• Use value soft cheese instead of the cream. Or mascarpone, ricotta - anything creamy