Cubed/sliced chicken breast
First, saute the garlic in butter and then add the chopped tomatoes. A few minutes later, add the mushrooms. Dredge the chicken in flour and add it to the pan after a little olive oil.
Start water boiling for your pasta, and get it cooking at the same time. I like angel hair, but in this instance, pretty much anything you like will work.
Cook the chicken through, then add some more olive oil, lemon juice, and the salt, pepper and basil to taste. I try to make sure there is enough liquid to make it a tad saucy, and then throw in your cooked pasta and toss together!
Also, this makes great leftovers. It seems like a lot of stuff I make isn't good on the second day. It gets mushy, or discolored or otherwise weird and unappetizing, but this is almost just as awesome reheated!