Ingredients
4 fennel bulbs, trimmed, halved lengthways and cut into 3cm wedges (750g)
2 tsp fennel seeds, lightly crushed
100g red seedless grapes
80ml maple syrup
85g unsalted butter, cut into small cubes
75g pitted Kalamata (or other black) olives
325g sheet of ready-rolled all-butter puff pastry
fine sea salt and black pepper
