Pre-heat the oven to 375ºF, 190ºC, Gas mark 5. Line a muffin tin with10 paper muffin cases. Grill the bacon until crispy and chop into pieces. In a large bowl, sift together flour and baking powder.
Stir the sugar, salt, three quarters of the cheese, bacon, sun-dried tomatoes and chives into the flour mixture and mix well.
In another bowl, beat together the eggs, milk and melted butter and pour over the dry ingredients. Stir until just combined, the batter will be lumpy.
Fill the muffin cases and sprinkle the tops with the reserved Edam. Bake for 20-25 minutes until risen and firm. Delicious eaten warm or cold.