Heat 2 tbsp olive oil in a frying pan over high heat. Add mushrooms. Cook, stirring often for 6 minutes or until liquid has evaporated. Transfer to a bowl. Set aside to cool completely.
Combine flour and salt and pepper in a large bowl. Whisk the buttermilk and eggs in a jug with a fork until well combined. Pour into the flour mixture and stir gently until smooth.
Add mushrooms, chives and parsley. Stir gently to combine.
Add enough oil to a large non-stick frying pan to cover the base. Heat over medium heat until hot. Drop heaped tablespoonfuls of mixture into pan. Cook for 3 minutes each side or until golden and cooked through. Serve at room temperature topped with a dollop of tzatziki dip.
Makes 30 fritters.