Instead of caraway seed, use 1 tablespoon of dried minced onion to add a subtle onion flavor to the bread.
Drain the thawed spinach in a strainer, then squeeze out the excess moisture using paper towels or a clean kitchen towel until the spinach is dry.
Most quick breads are removed from their pans to a cooling rack. This produces a drier, crispier surface. If left in the pan, the bread would steam and become soft.