For the waffles, preheat a waffle maker to a medium setting and preheat the oven to 140C/275F/Gas 1.
Mix the flour, baking powder, salt and sugar in a large mixing bowl. Whisk in the eggs, milk and butter until well combined.
Brush the waffle maker with a little melted butter and then ladle some of the batter into each well of the waffle maker. Close the lid and cook for five minutes, or until golden-brown and crisp. Remove and place on a tray in the oven to keep warm, while you use the rest of the batter.
For the strawberry compôte, place the sugar and five tablespoons of water with the butter in a saucepan. Add the strawberries and lemon zest. Simmer for five minutes.
To serve, stack the waffles onto each of four plates, top with some strawberry compôte and a dollop of vanilla ice cream. Finish with a drizzle of maple syrup.