Combine zucchini, carrot, onion, and flour in a bowl. Season with salt, pepper and turmeric. Add egg and mix well.

Heat oil in a large frying pan over medium-high heat. Spoon 1/4 cup batter into pan. Spread out to form a flat round.

Repeat to make more fritters. Cook for 3 to 4 minutes, each side, or until well browned. Transfer to a plate lined with paper towel. Repeat with remaining mixture, adding extra oil if needed.