Switch on the oven with grill function to preheat to high temperature.
Boil the potatoes in lightly salted water until soft, for about 5 minutes. Drain the potatoes.
In a large skillet with a heat-resistant handle, heat the olive oil over medium-high heat. Pour the onion into the pan and fry, stirring occasionally, for about 5 minutes, until soft. Add chopped zucchini and boiled potatoes and cook, stirring occasionally, for about 2 minutes. Introduce corn.
Pour the eggs into a bowl, season with salt and pepper, beat slightly with a fork and pour the eggs over the vegetables in a frying pan. Sprinkle the contents of the pan with cheese and cook over low heat for 4-5 minutes.
Then place the pan under the grill and cook for another 2-3 minutes.
Serve the tortilla immediately, sprinkled with paprika.