For the batter, in a small bowl, add the chickpea flour, turmeric, nutritional yeast, baking powder and salt and mix to combine. Add the water and whisk until smooth. Set aside.
Heat a non-stick frying pan over a medium heat with olive oil and sauté the onion. Season with salt and pepper and set aside on a plate.
To cook the omelette, brush olive oil over the same non-stick frying pan and place over medium heat. Pour the batter in the pan, tilting the pan into circular motion to spread it. Cook for 3-4 minutes.
Cover half of the omelette with the Violife Just Like Cheddar Shreds and onion and fold in half over the filling.
Top with the chopped tomato and serve with lime and parsley.