planning a dinner party,want to serve the Savory Plum Tart (feat. on this website) as a main dish. Need ideas for sides to go with it

I like these ideas; are there specific flavors that match well with the tart? I'm having trouble imagining what it will taste like.... :)

How about this: http://www.food52.com/recipes/4764_french_bean_salad_with_tarragon_and_green_peppercorn

And this:

http://www.food52.com/recipes/5425_summer_squash_couscous_with_sultanas_pistachios_and_mint