Add the flour, eggs, whole milk, water, melted butter, granulated sugar, vanilla extract, and salt to a blender. Blend on medium speed for about 30 seconds until completely smooth, then scrape down the sides and blend for 10 more seconds.
Transfer the batter to a bowl or measuring pitcher, cover with plastic wrap, and refrigerate for at least 30 minutes (or overnight) to allow the gluten to relax for tender, pliable crepes.
Combine the sliced strawberries, 2 tablespoons granulated sugar, and lemon juice in a medium bowl; toss gently to coat. Let sit at room temperature for 20-30 minutes, stirring once or twice, until the berries release their juices.
Beat the cold heavy cream, powdered sugar, and vanilla extract with a hand mixer or stand mixer on medium-high speed for 2-3 minutes until soft peaks form. Cover and refrigerate until ready to use.
Heat a nonstick crepe pan or 8-inch skillet over medium heat until hot, then lightly brush with melted butter. The pan is ready when a drop of water sizzles and evaporates immediately on contact.
Remove the pan from heat, pour ¼ cup of batter into the center, and immediately tilt and swirl the pan in a circular motion to spread the batter into a thin, even round. Return to heat and cook for 60-90 seconds until the edges are dry and the surface is no longer shiny.
Slide a thin spatula under the edge of the crepe and flip in one confident motion; cook the second side for 30-45 seconds until lightly spotted. Slide onto a plate and repeat with remaining batter, buttering the pan before each crepe.
Lay a crepe flat with the golden side facing down, spoon a dollop of whipped cream down the center, and top with macerated strawberries and their syrup. Fold into a triangle or roll into a cylinder, then repeat with remaining crepes.
Plate the assembled crepes and top with an extra dollop of whipped cream and a few fresh strawberry slices. Dust lightly with powdered sugar and add fresh mint leaves if desired; serve immediately.