Going to clean your string beans by breaking the ends of and breaking them in half if they are large enough. Like to break them into 3 inch size. After you complete that your going to soak in salted water and rinse your string beans off and place them into a colander to drain.
In a saute pan (make sure its large enough for 1/2 can of crushed tomatoes and your string beans). Your going to dose your pan with a generous amount of olive oil and your chopped garlic. Your going to start to brown your garlic lightly.
Now my preference for canned tomato has always been the san marzano variety. They are the meatiest flesh and best flavor.And I do prefer going ahead and getting the whole tomatoes in the can and crushing it myself by hand. Doing this will make a world of difference when cooking veggies or gravy (tomato sauce). I like them and I use them a lot. And just using this brand will make any dish you prepare unbelievable good. So there is half the battle. Take my word for it. they will be complementing you on whatever your making with these tomatoes.
So now that your garlic is lightly browned and you have turned off the burner you are going to add your crushed tomato, basil, string beans and salt and ground pepper. Your going to put the lid on and start the cooking process. Put it on medium high, get it cooking and then lower your burner to simmer. Your going to let that cook for about 25 minutes; your string beans should be fork tender.
You are just going to leave the lid on, turn off your burner and let it sit there while you finish the preparation of the rest of your meal. Make sure you put your parmesan cheese on top of your string beans so it will melt into them. Godere!!!