My Finn and Lara get romaine lettuce everyday and other variety of veggies, herbs and fruits in moderation.
So you can try baby carrot, cilantro, parsley, basil, kale, cucumber, dandelions, celery, dill, apple, grape, watermelon, baby spring veggies, and etc in moderation to give variety.
Hay should be given at all times with some pellets.