If you serve all vegetarian food, your new cafe will fail.
I read your other posts as well - and I am very excited for you! I truly hope your cafe is a success. It would be VERY helpful if you make a post/comment listing all of the resources/tools/space that is available to you. I read that your family owns another restaurant - hopefully this won't cause hard feelings if you take away any of their patrons!
do you have walk-in fridge/freezer?
ovens? steamers? cooktop? broiler? grill? hotboxes?
do you have a farmer's market nearby?
do you have a bulk grocery (sam's club, costco, bj's)?
will you be using sysco/sygma?
do you have a local fish purveyor?
custom bakery, or will you be making your own bread?
and the most difficult question... what culinary palate are you trying to reach?
is your dream to make five star food? or to have healthy sandwiches for 4 dollars?
do you want a menu with 10 choices or a menu like www.bernssteakhouse.com/BottomMenu/Menu/DinnerMenu/tabid/78/Default.aspx
how many employees will you have? what level of skill do they have?
how long do you expect your customer to wait for their food? 4 minutes? 30 minutes?
what is more important to you - presentation or big taste?
creativity or the "homemade" quality of the food?
now that I have interrogated you...
here is my all-time favorite vegetarian recipe
turn grill/broiler on high, slice globe eggplant 3/4 in thick. brush eggplant slices with olive oil (or extra virgin olive oil if you're into that)
slice tomatoes 1/2 in thick, and brush with O.oil, and salt both veggies. grill one side of eggplant, then flip eggplant, add shredded parmesan while still on the heat and add tomatoes to grill. wait 1 or 2 minutes, flip tomatoes, wait 1 min. and put a cibatta asiago baugette on the grill. if you timed that right, everything should come off when the bread is just starting to toast...
so take the bread slices off, then put them on the service platter, top with eggplant, then tomato slice, fresh ground pepper, then 2 or 3 fresh basil leaves then another slice of bread (offset). side item optional depending on plate design.
SUPER easy and simple and depending on the quality of the ingredients (namely the bread) you can charge a very wide price range.