eagerwatcher on "New site formatting problems , not centering and line spacing .."

Hi,

I just started a new site today http://best-food.info/

<h3>Tasty cooking doesn&rsquo;t get much easier than this!</h3>
<img class="aligncenter size-full wp-image-8" alt="Tricolor Farfalle With A Rich Tomato Sauce" src="http://best-food.info/wp-content/uploads/2013/12/Tricolor-Farfalle.jpg" width="480" height="320" />
<p>&nbsp; </p>
<h3 align="center">How to make an easy homemade tomato sauce?</h3>

The image isn't centered and the text under the photo is not down a line or centered.

Any help would be much appreciated,

Jane