You could have her visit the gardens, to pick edible herbs or flowers to rest0ck her supplies. You could  have her go to the Beast Pens and ask them to butcher poor animal so taht she can use it for tonight's main dish. You could have her deliver poisoned food to Enderall after Chuunitrixx little raid on her stores. You could have her deliver meals to one of the chapters, or to one of the lesser areas - I know the shrine maidens would appreciate not having to climb all the way down the tower's staircase just to get food for once. You could have her take a bath, for fan-servicey reasons. You could have her gossip with Mamoru, or ask her if the maid saw anyhting remotely edible on her little jaunt with Gromgard and his kids. You could have her go ask Gromgard if he'd let her cook one of his goblins, to see how it tastes, in case their food supplies run dangerously low...

Just some ideas off the top of my head.