There are a lot of reasons one might not get fat, so a thin person who eats pasta is not surprising. But a fat person with a pasta addiction (like me) has a good idea where to start changing his diet.
insulin is a powerful hormone which, among other things, sends a message to the body to store more fat instead of burning it
a sample size of 1 is hardly significant but you could be far from fat because of a number of reasons: you are young and/or have a high metabolism, you are active, your genes, you eat other foods which counter the carbs in pasta (fats and fiber), etc. there are a lot of variables
the ideal diet is one where your blood sugar is more or less constant throughout the day
the worst diet is one where your blood sugar spikes, forcing your pancreas to release insulin again and again
And insulin resistance is an issue if you're overweight. For a normal person it's a non-issue.
And, regarding "for a normal person it's a non-issue" – How do you think those overweight people got overweight? I was once at a healthy weight, but my terrible diet got me where I am today. If I'd eaten differently, I wouldn't be in this mess to begin with.
68.5% of the US adult population is overweight [1], so even if it was only a problem for overweight people, in the US at least, overweight is normal. ("Normal" and "ideal" aren't the same thing.)
[1] Ogden C. L., Carroll, M. D., Kit, B.K., & Flegal K. M. (2014). Prevalence of childhood and adult obesity in the United States, 2011-2012. Journal of the American Medical Association, 311(8), 806-814.
I've been on low carb, no wheat for 2 years now. It's been a miracle, really...
* there's a really good pizza recipe that is just cheese for the crust. amazing. Its better than regular pizza, really.
* lasagna/spaghetti you can use zuchini or spaghetti squash as noodles, and can eat in a bowl (just a tad more soupy), still tastes great (again, I love italian)
* I went through a phase where I ate cheese crisps (microwaved cheese, super yummy like crackers) and made flaxseed wraps (like bread). I don't make either any more, just pointless work.
* Pork rinds are amazing - good with soup, like a cracker, like croutons for a salad, with guacamole, nachos, hummus, or peanut butter. (note that the last two are easy for me to indulge on, I just have to watch)
* I Make 24 eggs at a time as a fritatta, make a pork shoulder in the oven, braised chicken thighs, oven roasted whole chicken, big batches that have many servings.
* I used to eat cereal every day, I but got over that quickly enough - now it's just 2 eggs each morning (slice of fritatta).
* I like hamburgers, but usually just eat them plain with a few pickles on top. less messy, and frankly you taste the meat more.
* I gave up beer completely, which I used to drink with pizza. Now its just red wine once in a while.
I don't go out to restaurants much because frankly we have better food at home and admittedly they're not usually low carb oriented. But you can always get a burger without the bun. Or a gyro plate. Mexican fajitas (hold the tortillas and chips) are a winner too.
I started off reading the wheat belly blog, and after I lost 10 pounds I bought his book. I also recommend "The art and science of low carb living". There's also great vids on youtube of atkins & LCHF stuff. I also read william banting's old pamphlet for inspiration.