Thinly slice the spring onion.
Process the spinach, eggs & herbs with a hand-held blender. Add the chopped spring onion, flour & baking powder, then crumble the feta into it. Mash through with a fork.
Heat some oil in a frying pan and add dollops of one tablespoonful of batter, spread around with the back of the spoon to form a round shape. Flip them after a couple of minutes and cook for another minute or so.
Transfer them onto a plate lined with paper towel and repeat the process with the rest of the batter.