Shrimp and Tomato Chowder

This is very quick and easy.  I loved the sweetness of the tomatoes and the perfect blend of the aromas.  So yummy!  It went perfect with the foccacia.
-1 Tbs olive oil
-1 large onion, chopped
-2 (14.5 oz) cans diced tomatoes with basil, garlic and oregano, undrained
-8 oz large peeled, deveined, cooked shrimp, with tails removed
-1/2 cup half & half
-1/2 cup water
-pepper, to taste
In a large saucepan, cook onion in hot oil until tender.  Add tomatoes and cook until heated through.  Add shrimp, half & half, and water.  Cook until hot.  Ladle into bowl and enjoy!