Preheat oven to 325°.
In a small bowl, combine the bread crumbs, Parmesan cheese and butter. Press onto the bottom of prepared pan. Place pan on a baking sheet. Bake 12 minutes. Cool on a wire rack.
In a large bowl, beat cream cheese and cream until smooth. Beat in the bacon, tomatoes, Gruyere cheese, and onions Add eggs; beat on low speed just until combined. Pour over crust. Place springform pan in a large baking pan; add 1 in. of boiling water to larger pan.
Bake 45-55 minutes or until center is just set and top appears dull. Remove springform pan from water bath; remove foil. Cool cheesecake on a wire rack 10 minutes; loosen edges from pan with a knife. Cool 1 hour longer. Refrigerate overnight.