I'm looking for some recipe ideas to prepare for a toga party -- other than greek salad of course :) Any and all suggestion are welcome.

You might get more ideas here: http://www.foodtimeline.org/

...and hemlock

I'm probably late to the party, but these sound tasty and easy to scale for a larger group. Just slice the sandwiches in smaller sizes.
http://food52.com/recipes/6917_greek_garden_lavash_wraps

For some reason ambrosia comes to mind.

Greek food is great for a party, but the Greeks didn't wear togas. (Check Wikipedia) Now, the Romans had an extraordinary history of extravagant banquets! Individuals spent until they were penniless, and the Emperor Heliogabalus reigned four years and completely emptied the treasury.... (I don't suppose you're planning that kind of party, though.)

So many awesome choices on this site, such as: http://food52.com/recipes/6207_keftastyle_meatballs_with_grilled_grapes_and_yogurt_sauce

How about lamb kebabs - http://www.marthastewart.com/351320/yogurt-marinated-lamb-kebabs and a tzatziki dip (http://www.marthastewart.com/339769/tzatziki) with warm pita bread