cake

I need some help here. But let me back up:

I have been working on fitness and (I think) doing a great job at being active.
For me, this is a pleasure and not a duty. It's necessary. It keeps me happy.
(Or at least even-keel). I find perspective. I release stress. I daydream.
I walk, I jog, I ride my bike to work. I do push-ups in the morning. Hurray! I love it.

I'm also happy to say that I always eat 5 fruits and veggies a day now. And sometimes 7.
Again, not hard to do. I like fruits and veggies. I live 4 blocks from a little neighborhood natural food store and a mile from a great supermarket. I have generous friends and neighbors who share their garden bounty this time of year. Our lot is full of and surrounded by fruit trees. Easy peasy.

Where I'm not doing so well health-wise....

is when it comes to eating cake. Or chocolate. Or ice cream. Or cheese.
I seem to be "on" or "off" when it comes to self-control, with very little reasoned room in the middle. Either I'm actively choosing not to consume those items (which, with a high cholesterol issue at my relatively tender (ahem) age I know I shouldn't), or I'm indulging without restraint. It isn't a healthy pattern, but I'm not sure how to break it.

Oddly, when we were in France this summer and surrounded by all kinds of delicious food, I felt much less tempted. I could enjoy bites of something, or taking a picture of it. I also felt more aesthetically fulfilled--the visual pleasure of being in a lovely place. And I had less stress. I was on vacation. It seems like the family dinner hour, when we reunite after the long day, is usually when the teenage p'tit minous choose to engage in some regularly scheduled sibling conflict. Which makes me automatically want to start finishing the ice cream.

(somewhat ironically, just as I was writing this, Minou came back from the store and put a chocolate button in my mouth.)

So, suggestions please!
How can apply the principles of minimalism--just enough and no more--to healthy eating and treats in moderation?