I've found myself in the position of recommending lunch and dinner spots, and thought I would pass them along here.
If you are looking for a quick lunch, but something more than McDonald's, I would recommend any of these:
QDoba is great mexican restaurant, and their burritos are unbelievable. They pack so much into the things that the poor tortilla shell can hardly hold it all. It is setup much like a Subway, in that you choose what you want on your burrito, taco salad, or other entree and they make it right in front of you. I usually go for the veggie burrito (yeah, yeah, occassionally this meat-a-tarian eats some veggies), and their nachos are really good as well.
This is a place that I've only starting visiting recently, but I'm a big fan. They have your standard hot and cold sandwich fair, but rather than serving it as a sandwich, it is rolled in a pita type bread wrap. Their wraps are great, and I'm a big fan of the chicken caesar.
This is a hot spot in Fishers, and VERY busy during the lunch hour. They do a brisk service though, and you should be able to get your lunch fairly quickly. The outdoor patio is nice on hot days. The deli sandwiches are good, as well as the soups and potatos. I usually go for some type of corned beef meal (Reuben or New Yorker) and a cup of potato soup. The drinks they serve come in enormous cups that won't fit in any cup holder. The sweet tea is very good.
Another sub shop, but for some reason this one stands above the cold meat sub crowd. I don't know what it is: the bread, the sauce, the meat.... their sandwiches just taste better than Subway's. I'm partial to the Billy Club on french bread (hold the tomatos).
Depending on whether you are looking for a very nice, but pricey meal, or just something quick, you can probably find something you will like in this list (I certainly did).
El Camino Real
This is your typical strip mall Mexican restaurant, but the food is very tasty. The service is very, very fast, and the atmosphere is very laid back. The prices are great for a family too. We can usually get in and out for less than $20. I'm pretty predictable here, as I almost always order the special dinner #4.
If you live in or around Fishers, you have to try a Nancy's Pizza at least once in your life. These are monster sized Chicago style pizzas. The closest thing to compare to them is Uno's, but these are even bigger (and arguably better). The pizzas have a very deep dish crust, almost two inches deep if you are lucky. This is truly a pie pizza, filled with sauce, toppings, and cheese. To call them toppings is kind of a misnomer, as they usually end up pretty well buried in the heaping layer of cheese. This certainly isn't the pizza for the lactose intolerant. One to two pizzas is more than a meal for most, so be cautious when you order. It may seem like you need more, but you will definitely have leftovers.
If you are looking for a little bit more upscale meal, the Rathskellar is a very nice German restaurant. We've been there a couple of times, and it has always been fun. The food is great, with the variety of schnitzel's coming on plates bigger than your head. After dinner, there is a beer garden outside that hosts local bands. It is great for an evening out.
If you are looking to feed a large group, Maggiano's is the place to go. Maggiano's is a family style Italian restaurant in front of the Keystone at the Crossing Mall. If you order family style, you get all you an eat of two salad choices, two appetizers, two anti-pastas, two entrees, and two desserts. The amount of food on the table is awesome, not to mention how great everything tastes! It is usually a good idea to call ahead and make reservations, especially for a large party.
The Cheesecake Factory
I always debate recommending this one. The food is spectacular, but the big drawback is the wait. The Cheesecake Factory is in the Keystone mall, and regardless of when you go in you are usually in store for at least a one hour wait to get a table. It was so painful that Jenn and I stopped going, and we LOVE The Cheesecake Factory. If you are on the fence, a good compromise is to hop in the dessert line and get an order of cheesecake to go. They have a wide selection of cheesecakes (go figure) as well as other desserts, and they are ALL very good. If you have the extra time, the food is wonderful, and I absolutely love the spicy cashew chicken.
So if you are in the Indy / Fishes area, and need some good eats, go ahead and try some of these.