Question: what are blintzes made of?
Answer: Place 3 eggs, flour, milk, water, vegetable oil, sugar, salt, and vanilla extract in a blender. Blend until completely smooth, 1 or 2 minutes, scraping down sides as needed. Let batter sit at room temperature 30 minutes. Whisk together ricotta cheese, cream cheese, lemon zest, egg, sugar, and salt in a mixing bowl.