In a large bowl, add your eggs and whisk them until light and well combined. Set aside.
Heat a nonstick frying pan on medium heat and add olive oil.
Once hot, add green onions and red bell peppers.
Stir with a nonstick spatula until bell peppers are soft, about 5 minutes and when ready, remove from pan into a bowl and set aside.
In the same bowl as your cooked vegetables, add your tuna, paprika, mozzarella cheese, and mayonnaise.
Mix until well combined and set your omelette filling aside.
In the same non-stick pan as your cooked vegetables, heat it on medium and add oil.
Add your eggs and cook for 2-4 minutes until a skin forms.
Add your filling on one side of the omelete and let cook for 2-4 minutes until the egg yolk has hardened.
Flip to cover the filling and place it onto a plate.
Top your omelette with cheese, green onions, and some black pepper (optional).
Serve and enjoy!