What feature is unique to the "Aussie-tizer" section of the menu?

The unique feature of the "Aussie-tizer" section of the Outback Steakhouse menu is that it offers smaller portion appetizers designed for sharing. This concept encourages social dining, allowing guests to sample a variety of flavors and dishes while sharing with others at the table. The emphasis on smaller portions makes it ideal for those looking to try several different items without committing to a full-sized dish. This social aspect aligns well with the restaurant's informal and laid-back atmosphere, appealing to diners who prefer a communal dining experience.

The other options do not accurately represent the "Aussie-tizer" section, as it is not limited to vegetarian options, focuses on a range of appetizers that can include different proteins rather than solely seafood, and does not specifically concentrate on spicy dishes.