Combine eggs, milk, flour, sugar and vanilla in a blend and blend on high until smooth.
Coat a 9" skillet with cooking spray and warm over medium high heat. Pour about ¼ cup batter into the skillet, tilting the pan to coat the bottom. Cook the pancake until the top is covered with little bubbles, about 30 seconds. Flip the pancake with a large spatula and cook on the other side until lightly browned. Repeat with the remaining batter.
For Cheese Blintzes: In a small bowl, combine cream cheese, milk and powdered sugar to taste. Spread a small amount on each pancake, add jelly or fresh fruit if desired. Roll and eat.