Preheat oven to 400°F.
Wash and cut tomatoes in half. Place them in a baking pan, cut side up. Set aside.
In a small bowl use a fork to combine chopped parsley, minced garlic, salt and pepper making a chunky paste.
Place a heaping teaspoon of the parsley/garlic paste onto each tomato half.
Drizzle tomatoes with olive oil.
Roast tomato halves in the oven for 40-50 minutes, or until tomatoes begin to blacken and char.
Cook pasta according to package directions. Drain, reserving some of the pasta water.
Once tomatoes are charred, remove them from the oven and place them in a large bowl along with all the juices that are in the pan.
Add the butter and torn basil leaves.
Use a pastry cutter to mash everything up into a chunky liquid.
Toss with cooked pasta. Add pasta water to thin sauce if mixture seems too thick.
Top with shredded Parmesan cheese to serve.