Norwegian heart waffles with brown cheese (Vafler med brunost)

1. Whisk the eggs with the sugar until frothy.

2. Add the flour, ground cardamom and half the milk and stir until smooth; then work in the remaining milk and the sour cream to make a smooth batter.

3. Melt the butter, let it cool slightly and stir it into the batter; let it rest for at least 15 minutes so the flour can swell.

4. Heat the waffle iron, brush it lightly with butter and pour in a ladleful of batter.

5. Bake for 2-3 minutes until golden, then place on a rack so they don't go soggy; bake the rest the same way.

6. While warm, top with thin slices of brown cheese cut with a cheese slicer and serve at once.

Tip: In Norway, vafler are a must at weekend coffee time and on ski trips, and mountain cabins often bake them on the spot. Brown cheese (brunost) is made from caramelised whey, so it's sweet with a caramel flavour - it melts slightly on the warm waffle, and that's the whole point. If you can't find brunost, sprinkle a soft goat's cheese with a little brown sugar, or simply serve with jam and sour cream.