I have read that you can keep mashed potatoes warm in a slow cooker. Assuming it could be anything like that, including creamed spinach. The wrinkle: I do not have a slow cooker! So -- was wondering if I can use my Zojirushi rice cooker to maintain it warm. Thinking I'll cook it this morning, it will take a couple of hours until it's the right consistency, then warm it up... Will it turn the spinach brown?