If you use a fresh corn, boil a crenel of corn for 25 minutes in a slightly salted water, if you use frozen corn, toss it on a skillet with a touch of olive oil for a few minutes until soft and ready. Set aside.
Mash avocado with salmon in a small bowl. Add salt and pepper.
In a large salad bowl place fresh spinach, then squeeze 1/2 of lemon on it. Massage spinach for a few seconds. Cut cucumber and pear in small pieces. Add to spinach. Add corn, mashed avocado, and salmon. Stir everything well, to make sure that the salad is well mixed. Add olive oil if you like and any other baked vegetables to make it customized for you. Add more salt and pepper. Enjoy!