Heat 2 tablespoons of oil in a non-stick pan over medium-high heat (use medium if your stove is particularly strong). Drop 1/4 cup of batter into the pan (an ice cream scoop works perfectly). Cook 3 or 4 fritters at a time.
Lightly flatten each mound with a spatula to about 1cm / 4/5" thick.
Cook for about 3 minutes until the bottom is a deep golden color. Adjust the heat if they are browning too quickly. Flip and cook the other side for another 3 minutes. Transfer the cooked fritters to the tray in the oven to keep warm.
Repeat with the remaining batter.
Serve immediately with a dollop of yogurt or sour cream and garnish with extra chopped green onions, if desired.