Spaghetti with Olive-Caper Sauce and Shrimp

This is another super easy and simple meals.  It's very filling and full of flavors from the wonderful combination of the capers, kalamata olives, fresh tomatoes, garlic, cheese and other goodies.  Great dish.  Enjoy!
-12 oz spaghetti
-1 garlic clove
-2 Tbs capers, drained
-1 tsp red pepper flakes
-2 Tbs extra virgin olive oil
-5 Roma tomatoes, chopped
-1 cup kalamata olive, roughly chopped
-3 Tbs unsalted butter, at room temperature and cut into pieces
-8 oz fresh mozzarella cheese, chopped
-14 oz medium cooked shrimp with tails removed
Boil pasta according to package directions.  Reserve 1/2 cup cooking water, the drain the pasta.  Set aside.
Meanwhile, mix the garlic, 1 Tbs of the capers, and the red pepper flakes into a paste.
Once the pasta is drained, add the garlic mixture, oil, tomatoes, olives, remaining Tbs of capers, butter and cheese to the pot.  Mix very well until the butter is melted.  Toss in the shrimp and the reserved cooking water.  Season with a little salt.  Toss well, serve and enjoy!
Slightly adapted from a recipe found on food network.