Taking what was said here in consideration, I started eating more on my off days. I've put about 3 lbs back on, which doesn't sound like much, but it's big for me. I'm happy to say, it looks like muscle weight.
Here's some of the in between meal snacks I've added:
Soy Yogurt Smoothies (Silk, and Whole Soy make yummy ones)
Almonds, cashews, and pistachios
more fruit (so even more bananas, strawberries, oranges, avocados etc)
more Orange Juice

I also got myself a "bento box" for my bike, so now the food is always right in front of me. I'm remembering to eat on the bike more often, and that has been terrific for stamina. After a ride I have a full drink of Endurox, followed by a soy yogurt smoothie if I can "fit it in". (BTW, the soy yogurt smoothies have the same 4:1 ratio of carbs: protein, so it makes the perfect after ride snack.)

Thanks for all the good advice, ladies. This thread has been extremely helpful for me!