Peel, wash and slice the potatoes. Heat oil in a coated pan. Fry the potato slices for about 15 minutes at medium heat, turning them from time to time.
Clean, wash and cut the spring onions into rings. Peppers clean, wash and cut into fine strips. Pour the beans onto a sieve, rinse and drain. Add spring onions, bell peppers and beans to the potatoes, season with salt and pepper and fry for another 5 minutes.
Mix eggs and milk. Season with salt, pepper and paprika. Pour egg milk over the potatoes. Cover and let it simmer at low heat for about 10 minutes.