I make chicken quesadillas a lot, and of course there a zillions of ways to make them so I'll try and summarize what I do here.
I boil up some chicken (as much as you need for the number of people you're going to feed). Usually I use chicken broth and water, just to give it a little bit of extra flavor. I'd use all chicken broth, but I don't have a stockpile.
I then shred said chicken, and throw it in a pot with a tub of fresh salsa that I buy in the produce section of the grocery store (16oz), and some hot sauce. I use Cholula, because I'm a wuss...you guys could use something better, use hotter salsa, add hotter peppers, whatev. Sometimes I throw in a bit of jarred salsa because the fresh stuff doesn't have that seriously concentrated tomato flavor. This isn't rocket science, so whatever tastes good is cool. Occasionally I'll throw in some taco seasoning. It just depends on my mood. Nothing fancy.
When it's all cooked down and zesty and whatnot, I'll take a tortilla and throw a pile of shredded cheese on it (I like the four cheese Mexican blends you can find at the grocery store), throw the yardbird in, and stick it under the broiler. I usually fold mine over so it's one quesadilla in a half-moon shape. If I'm extra hungry I'll put all that on one quesadilla and throw it under the broiler. I like to crisp up the tortillas a little first before I even put the cheese on them as well. My BFF has this wacky little quesadilla maker that her mom got her for Christmas. You can get it on Amazon, at Wal-Mart and Target as well, I think. She asked me to make these for her once and we tested out the contraption for the first time. It actually worked really well for us.
Also, my friend likes Spanish rice in her quesadillas, so I just get the stuff in the box, and throw another tub of that salsa in instead of the canned tomatoes it suggests.
Another easy meal is to use that Spanish rice, and just cut up pieces of chicken breast and throw it in with the rice as it starts to cook. The 20 minutes or so that the rice simmers cooks the chicken just fine if you cut it up in to bite-sized pieces. I cover mine in cheese, put some sour cream on, and put in diced fresh tomatoes.
Not rocket science, and not some amazing wacky health-crazed dinner thing, but it's pretty tasty for something that's quick and easy.