Raspberry Swirl: Heat raspberry preserves and water for about a minute in the microwave, mix. Strain through a mesh strainer to remove seeds. Set aside
Cream sugar and softened cream cheese until smooth. Mix in sour cream and vanilla.
Add eggs, one at a time, beating after each until just combined. Scrape bottom and sides of bowl and beat for a few more seconds. DO NOT OVERBEAT.
Preparing: Pour half of the filling mix into the prepared crust. Level. Swirl half of the raspberry preserves. Add the rest of the filling, then swirl the rest of the raspberry on the top.
Baking: Place the pan into a casserole dish, then add water in the dish (outside the pan) until about halfway up the side. Bake for 50 to 60 minutes. The filling will be set about 1" around the edges, but still "jiggly" inside.
Cooling: Remove from oven and cool on counter for about an hour. Transfer to fridge and cool completely (about 4 hours).