Mix spinach, mashed sweet potato, eggs, salt and pepper, and half of goat cheese until well combined. Mixture will stay together without the breadcrumbs, but some like latkes a little firmer, so add the panko if desired. Heat oil in frying pan and drop batter by small tablespoons. Cook about 3 minutes until browned, turn over and cook 2 more minutes. Remove to paper towels to drain excess oil.

While frying latkes, heat the other half of the goat cheese for about 15 seconds in the microwave. Stir well, adding a little milk if needed to get to a sauce-like consistency.

Serve latkes with goat cheese sauce.