What tools are available to change the mindset from "comfort eating" to "fuel?"

I agree with the others . . . but am going to pick it apart more.

Here's what I think:

Yes, we need food for fuel (energy) and nutrition.

Pleasure is part of a happy life, when we can get some. Pleasure in eating need not be off limits. But:

We don't pursue pleasure to an extreme, or if we do there are bad consequences. Consider what life would be like if we indulged in various non-food pleasures to the absolute maximum. (I leave the specific pleasure types to readers' individual imaginations.) Results, probably not good, just as with overdoing pleasurable eating.

You mention "comfort eating". That's not exactly pleasure, is it? IMO, it's more like compensating in one realm for problems in another. Problems are better dealt with via their root causes, not by compensating through other means.

If a person needs comfort because of stress, then there are lots of other stress management techniques: Mild exercise, prayer/meditation, breathing exercises, hot aromatherapy bubble bath, journaling, other creative activities that release stress, adult coloring books, self-hypnosis, massage (including self-massage techniques), yoga, etc.

If other emotions are leading to comfort eating, then it may take a little more self-analysis to figure out the root cause. Once that's identified, seek out something that deals with the problem, rather than simply distracting from it (as comfort eating may do). This can be hard and scary at first, but can lead to healthy self-realization and growth.

IMO, what I'm really looking for in eating - and in life overall - is balance: Enjoying pleasurable things, but keeping them in a reasonable overall average context with essential self-maintenance, such as the fueling/nutrition aspects of food and eating.

Being substantially overweight is not pleasurable - don't I know it! For me, it was important to viscerally realize that my future self's pleasurable life depends on my current self moderating my calorie intake (and getting reasonable nutrition). I needed my future self to feel real to me, and getting there really helped me with maintaining better current life balance in various ways - food, sure, but also things like finances and more. YMMV.

Best wishes1