Squeeze defrosted broccoli to remove as much moisture as possible to give you about 250g (9oz) broccoli. Place chopped broccoli in a medium bowl. Finely chop bacon (or ham) and add to the broc. Add eggs, parmesan and a pinch of salt. Stir to combine.
With clean hands form 1/4 the mixture into a medium patty about 1cm (1/2in) tall. Place on a baking tray lined with paper. Repeat with the remaining mixture. Drizzle with a little oil.
Bake patties for 13-15 minutes or until golden brown and sizzling. Until the burgers feel cooked and springy when you touch them. If you’re not sure give them more time.
When the burgers are cooked divide the mayo between 2 plates. Top each with 2 hot burger patties and the leaves and enjoy!