Heat the vegetable oil in a large skillet over medium heat.
Add the sliced potatoes to the hot oil and fry until they are golden brown and crispy. Stir occasionally to ensure even cooking.
Once cooked, remove the potatoes from the skillet and place them on a paper towel to drain excess oil.
In a large bowl, beat the eggs and season with salt and black pepper.
Stir in the chopped onion, tomato, and green bell pepper.
Add the fried potatoes to the egg mixture and mix gently to combine.
Pour the potato and egg mixture back into the skillet, spreading it evenly.
Cook over medium heat until the eggs are set and the bottom is golden brown, about 5-7 minutes.
Carefully flip the Chipsi Mayai using a plate or a large spatula and cook the other side until golden brown, about 3-5 minutes.
Once fully cooked, remove the Chipsi Mayai from the skillet and let it cool slightly.
Cut into wedges and garnish with chopped fresh cilantro if desired.
Enjoy your meal!