I proposed to my boyfriend at LEGOLAND with a LEGO version of us when we first met (me dressed as Amy Pond and him in a top hat) in front of a LEGO TARDIS. I made him use a sonic screwdriver to get the ring out. =)
Not trying to be rude, just trying to be literal.
It's OK, I'm pretty sure nobody's going to be upset if some of the foundation is showing.
Sarah says: "My husband loves LEGOs, so he designed his groom's cake. He also built the base. There's even a little LEGO cake topper. The man loves his toys."