What are the minimum items I need to get from the Overworld to the End?

I'm planning to do a "speedrun" per say. Not really a speedrun, but a run that invovles creating a new world in hardcore mode, and venturing to the End to defeat the Ender Dragon.

My question is this. What are the minimum items I will need to reach the enderdragon? What items will I need? What food, what potions, what weapons will I need to bring? (Do I need anything higher than an Iron Pickaxe?)