01 - Combine ricotta, sugar, lemon zest, lemon juice, vanilla, and salt in a mixing bowl. Beat until completely smooth and creamy.
02 - Whip heavy cream in a separate bowl until stiff peaks form. Gently fold whipped cream into ricotta mixture until fully incorporated.
03 - Transfer lemon cream filling to a piping bag. Pipe filling evenly into both ends of each cannoli shell, ensuring shells are generously filled.
04 - Beat egg whites and cream of tartar with electric mixer until soft peaks form. Gradually add sugar while beating, continuing until stiff, glossy peaks develop. Mix in vanilla extract.
05 - Spoon or pipe meringue onto the filled ends of cannoli, creating decorative peaks.
06 - Use kitchen torch to lightly toast meringue until golden brown. Alternative: place cannoli on baking sheet and broil for 1-2 minutes, watching closely to prevent burning.
07 - Serve cannoli immediately while shells remain crisp and meringue is freshly toasted.