In a large bowl (or blender), beat together egg, milk, water and melted butter. Beat in flour and salt until smooth.
Heat a medium, nonstick skillet over medium-high heat. Place 1/4 cup of crepe batter into center of pan, tilting to coat the bottom. Cook until golden brown on one side, about 1-2 minutes. Flip to brown the other side. Set aside each crepe; continue with remaining batter.
Slice strawberries and then assemble. Place a line of overlapping strawberries down the center of each crepe and roll it up. Top with yogurt; or place yogurt inside of crepe with strawberries. Repeat with remaining crepes.