Tap the double square icon at the top right, each open tab becomes a large scrollable thumbnail, then either swipe the page left, or tap on the (x) in the corner of the page.
Alternately, you can pinch the screen to get to the same place.
You won't have an absolutely blank page. Instead you'll have a collection of icons for the links in your Favorites folder. The totally blank Safari page is a thing of the past.