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Though it all depends on your macro goals, how much you exercise, your weight loss/gain goals, etc, I'm going to assume you're way overboard in carbs.

If you're cooking the pasta at home, look at the nutritional info on the box and see how many times the suggested portion you're eating at a time (usually 2oz or 56g of dry pasta). If you have a food scale, use it. If not, google around for "how many cups of penne in 2oz" (just over half a cup of dry penne).

I advocate for gradual change. If you find out your normal portion is 6oz of dry penne (almost 2 cups), try to knock it down to 4oz next time. If that leaves you hungry, add a sliced chicken breast, or canned tuna. Then bring it down to 2oz, and add some cherry tomatoes, asparagus.

Keep working with the portion sizes on the box. That's something that helps keep me accountable.

Spaghetti, alfredo, mac & cheese, lasagna.... it really all depends on the type of pasta you have, if you like sauces, what kind of sauces you like, what your calorie/macro goals are. There are many, many pasta recipes available. Just do a bit of Googling.

Portion control is key, however you just don't get much bang for the buck. Have a family dinner or invite people over, cook it up and watch your portions. Or you could donate it to the local food bank and opt. For a higher protein / whole grain choice for yourself.