The breaking of the bread during your wedding ceremony would symbolize all of that. And if the ceremony included the combining of families as in the bride and/or grooms children, the breaking of bread would be the most fitting of the unity ceremonies. The signifying of sharing the first meal together as a family.
I associate bread(food) with marriage nearly on every level. In fact if my home were a body my kitchen would be it's soul. As our days begin so do our first meals and as the sun lowers we crowd around my table for dinner and conversation. In marriage, nearly everyday you will share a meal and in marriage you will eat from the same table, drink from the same cup and share the same journey.