Preheat oven to 325°F. Grease 9-inch springform pan. Wrap bottom and sides in foil.
(Optional) Mix crust ingredients, press into pan, bake 10 mins.
Beat mascarpone, cream cheese, and sugar. Add eggs one at a time. Stir in vanilla, yogurt, lemon juice/zest gently.
Pour filling over crust. Place pan in roasting pan, fill halfway up sides with hot water.
Bake 60–70 mins until edges set and center slightly jiggles. Cool in oven 30 mins, remove and cool completely. Chill 4 hrs or overnight.
Serve with berries, caramel, chocolate drizzle, or whipped cream.