Sift together flour, sugar and salt; set aside. In a large bowl, beat eggs and milk together with an electric mixer. Beat in flour mixture until smooth; stir in melted butter.
Heat a lightly oiled griddle or frying pan over medium high heat. Pour or scoop the batter onto the griddle, using approximately 2 tablespoons for each crepe. Tip and rotate pan to spread batter as thinly as possible. Brown on both sides and serve hot.
Combine the raspberries, sugar, and orange juice in a saucepan. Whisk the cornstarch into the cold water until smooth. Add the mixture to the saucepan and bring to a boil.
Simmer for about 5 minutes, stirring constantly, until the desired consistency is reached. The sauce will thicken further as it cools.
Puree the sauce in a blender or with a handheld immersion blender and strain it through a fine sieve. Serve warm or cold. The sauce will keep in the refrigerator for up to two weeks.
Gently and carefully spread Nutella on a crepe, pour 2 tbsp of raspberry sauce to spread on top. Roll the crepe, then repeat the process with the other crepes.
Place 2-3 rolled crepes on a plate. Add a dollop of cool whip on the middle-top, garnish with fresh berries, then drizzle a little bit more raspberry sauce on top.