Millet and Teff with Squash and Onions Measure 1 cup of millet. Rinse millet until water is clear. Put in a large pot. Add 1/2 cup of teff grain pinch of sea salt 1 sliced onion 1 butternut squash cut into bite sized or larger chunks (cut the skin of the squash off too) 4 1/2 cups of water Stir and gently mix up the ingredients. Simmer 20 minutes or until all the water is absorbed.