Italian white beans -
https://www.platingsandpairings.com/italian-white-beans/
This is the concept, but I use canned and make life easy on myself.
I've also been known to offshoot from this and use garlic and basil with sauteed onions, bell peppers, spinach, and tomatoes for a nice bean main...
And lemon, olive oil, and garlic shrimp - so good, so simple.
Another favorite dish is a macedonia (fruit salad). Normally, an Italian main without pasta still needs a side, and this serves nicely for a side.
I also like panzanella, and if you're concerned for the carbs, just change the ratios of bread to the vegetable in the salad (and add even more types of veg) and decrease the dressing slightly til the new ratio is right.
In fact, you can do that for pasta...rather than making a little sauce and a lot of pasta, do a lot of sauce with veg and less pasta. My bolognese or Lenten tomato sauce is pretty much my "empty out my fridge for appropriate veg" sauce and has about 1/2 sauce to 1/2 pasta by the end...