Grocery List?

What are your staples on your guinea pig grocery list?

We were feeding this guy from our yard/vegetable garden to his immense joy (LOTS of dandelion, which he loved) but winter is upon us and that's not providing him enough fresh greens. (He gets plenty of hay/pellets, no worries there). The internet has tons of opinions, but I'd like to hear yours. So what are your staples, your give some every day items that are healthy for these guys?