In a large bowl, whisk the eggs until well combined. Add the turmeric, salt, and black pepper, and mix until incorporated.
Heat the olive oil in a non-stick skillet over medium heat. Add the chopped onion and sauté until translucent, about 5 minutes.
Add the diced bell pepper to the skillet and cook for another 3-4 minutes until softened.
Stir in the diced tomato and cook for an additional 2 minutes, allowing the mixture to soften.
Pour the egg mixture over the sautéed vegetables in the skillet. Reduce the heat to low and cover the skillet with a lid. Cook for about 8-10 minutes, or until the eggs are set.
Once cooked, gently slide the omelette onto a serving plate. Garnish with fresh parsley before serving.