Preheat oven to 400F.
Make farro according to package instructions. Careful not to overcook. (You want it to be al dente and a bit chewy).
Wash the squash. Slice off the stems and cut the squash in half lengthwise. Scoop out the seeds so each half has a cavity for the stuffing. Careful not to scoop out the actual squash flesh. Place each half on a parchment lined baking sheet (or pyrex).
Brush tops and bottoms of the squash with olive oil and season with salt and pepper. Place squash cut side up. Bake until the flesh is soft. Time varies depending on the size of the squash. It could take 30 – 45 minutes until fork tender. Set aside and allow to cool.
For the stuffing. Put oil in frying pan, add onions until translucent, add garlic until fragrant, add zucchini until soft, then add mushrooms until soft. Finally, add cooked farro, chopped herbs. Season generously with salt and pepper.
Press the vegetable and farro mixture firmly into the baked delicata squash and top with shredded cheese.
Bake in oven for 7 -10 minutes until cheese is melted.
Option to sprinkle herbs, and drizzle with balsamic reduction or tahini. But not necessary.