Preheat oven to 350 degrees.
Line the bottom of a 9 inch springform pan with nonstick foil.
Combine parmesan cheese, bread crumbs and melted butter. Press into the bottom of the springform pan and bake 10 mins. Cool.
Increase your oven to 400°F.
In a mixer, beat cream cheese smooth.
Add eggs.
Beat until well combined.
Add cheddar, sour cream, chives, bacon, flour (or cornstarch), salt and pepper.
Pour this filling into the pan.
Bake for 15 minutes and then reduce the temperature to 325.
Bake for about 45 minutes. It should be golden and not too wiggly in the middle.
Remove and let cool.
Run a knife around the edges and chill overnight.
Remove the sides of the pan and top with the toppings.
Let sit at room temp for 2 hours before serving.
Serve with crackers.