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If I were to say I am a good cook even at home or on the road, it would be a lie. I do eat for my health. I avoid highly refined carbohydrates. I tried to get all vitamins and minerals and enzymes and electrolytes naturally. A number of times on bicycling tours I had pots pans, a stove. I didn't use it. I did not use them for some reason. I was always anxious to keep moving and thought the time necessary for preparing food was a hindrance. Other foods were available readily. I got in a habit of eating the wrong kinds of foods for energy. I did not eat that kind of stuff anymore. Fresh fruits, fresh vegetables, whole grains, whole cereals. That's the way to go.
I guess everyone is just different.
For me, meal prep doesn't take that long, typically half an hour for either breakfast or dinner including cleanup. And a lot of that half hour (at least for breakfast) is waiting for water to boil or coffee to brew. Rather than sit around waiting I can use that time to pack up and get ready to roll. If I'm in a terrible hurry (bad weather or a schedule to keep) I can usually be moving half an hour to forty-five minutes after I crawl out from under the quilt. More typically it is an hour or so, especially if I am traveling with others who aren't quite so insanely efficient.
I sometimes do go into no cooking mode, but what I find is that the food choices end up more limited, more expensive, and I end up basically eating restaurant meals most of the time. There are some things I frequently eat that don't require cooking (tabouli is a good one, and if I bring the right stuff most of the prep time can be done while riding to camp). But I also find this is a psychological game and the morale boost of a hot cup of coffee and half-and-half on a chilly morning or getting outside a hot meal after a long day's ride are worth the additional weight and prep time.
Honestly for me decent food on tour is a bigger comfort and morale win than a camp chair ever could be.
I've got about half a dozen different meals I can rotate through for variety, with there being more variety on the dinner side of things than with breakfast. Lunch is usually a series of snacks served between breakfast and dinner when I'm on the go. In practice if I'm not moving I'm either laying down or eating. Sometimes I'm eating while on the move.
A few of the meals I make are easily improvised from mini-mart foods so I'm not anchored to resupplying at an Albertson's.
One of the recurring challenges is that when you go into serious calorie deficit (which on the average happens about day five for me) you are left with some pretty brutal choices between getting as many calories as possible and eating healthy. Which definitely won't be the same foods.