For me, boneless and skinless chicken breast and potatoes (boiled, baked or mashed, with no skins) are my best friends during a flare and I need to eat lower fiber/residue foods. A few seasonings that are not bad to use are ground ginger, lemon juice or ground lemon peel, a little white wine, a bit of olive oil, ground basil (or fresh if you can chop it real fine to avoid problems in your guts), ground turmeric, fine ground fennel seed and fine ground rosemary. Ginger's a big digestive aid, as are the rest of those in one form or another. I also use honey in my cooking, but I can get the good stuff that's real good for you (not the far too refined stuff in the little bears in the grocery stores) from my Dad who has several hives in Ohio and West Virginia. Paprika is a flavor enhancer and shouldn't cause you any problems, but go easy on it at first, just in case. I've also lately been using apple cider vinegar because of the various health benefits.
They actually have a smoked paprika out there that I've been wanting to try. It's a little more expensive than normal paprika, but I've heard it tastes great. If you want more flavor go pick up some of the flavored olive oils they have on the market to cook with, just don't go overboard on the oil and it should be kind to your guts. I've heard that black pepper can irritate the bowels, but red or "rose" peppercorns are not pepper and don't have the same stimulating effects, so if you can invest in a pepper grinder or an electric "burr" grinder (the kind you grind coffee with) you can powder some and use it in place of black pepper. It tastes kinda like black pepper, but without the heat of black pepper. You could even use a burr grinder to grind your own "safe" spice blends to use on your food (and make 'em salt free too). I add onion powder (not onion salt) in my spice blends too. Best thing is to make sure any spice you use is powdered and not in little pieces. And the biggest thing to remember is if anything bothers your bowels, don't use it. Keep a food journal if you gotta.
I do a lot of grilling with my gas grill on low and slow heat and for some added flavor I keep a plank of hickory, cherry, oak, mesquite, or some other flavorful wood on the grill grate. Adds a lot of flavor to your chicken or fish without adding any spices at all. You just have to check it occasionally to make sure it's just smoking and not catching fire.
There's a number of websites that have a list of low fiber low residue foods you can use. I tend to eat a lot of pasta during these times (not aldente), and ofttimes egg noodles especially, but pasta really doesn't bother my insides and if I'm not eating well to begin with carbs aren't necessarily a bad thing. I can also tolerate small doses of hamburger, but it has to be chopped up as small as I can get it in the pan to help with digestion. And I'm a chewer, with Crohn's you kinda have to be, biggest problem people have with digestion is wolfing down food without chewing enough. Takes longer to eat, but it's better that than getting something stuck that I didn't chew properly. I eat a lot of soup as part of a low fiber low residue diet and if you can do so, make your own. Buy a whole chicken, debone it, make your own chicken stock (I like stock better than broth for the unctuousness or mouth feel of it). If you can't debone a chicken get a good cookbook that tells you how to do it. One of the biggest things you can do for yourself and your Crohn's is to take food prep into your own hands. Look up some good chicken soup recipes and go to town. No canned/jarred soup is better than the homemade kind.
Now, far as cutting out hamburger completely, try ground turkey or ground chicken. I love ground turkey in pasta sauce as a change from hamburger and you can season it up a little and it'll actually absorb flavors better than hamburger does. I've even made turkey meatballs before. Turkey digests better than red meat anyway.
I eat fish too, but there are differences in fish and some are a little tougher to digest than others. Salmon is loaded with Omega 3 and is not bad on the digestibility scale if it's not overcooked and dry. I like tilapia fillets myself for various reasons. One thing people tend to do is overcook fish (or any meat really), which makes it tougher and thereby harder to chew and digest. Best thing to do is to get the fish to around 150-155 degrees and take it off the pan or grill and let the internal heat carry over to 160. An internal temperature of 160 kills all types of food bourne bacteria, so the food scientists say. Though generally, with many fish, when it flakes up with a fork it's done. Salmon turns pink and flakes when you pull some up with a fork (and sometimes 160 degrees makes it a little dry). White fish like catfish or tilapia turns opaque white and flakes with a fork. (I know, this is a pretty silly thing to explain, but there are folks out there that end up turning fish into a piece of shoe leather by overcooking it). Keep in mind here that some folks still have issues eating fish during a flare up so be cautious. I've been thinking of making salmon patties like you would make crab cakes, without big pieces of vegetables in 'em, of course, as a nice change of pace.
To keep your fruits and vegetables intake up you can either make juice or get some V8 juice cocktail. I buy the one that says antioxidant and warm it up in the microwave and drink it like soup. I can't really stomach it cold; just tastes kinda blegh cold. I've cooked with V8 too and it makes a decent tomato base for a vegetable soup or minestrone.
Anyway, one of the biggest things to remember with this disease, and something I can't stress enough, is that all of our bodies are different and what some may be able to tolerate, others may have major issues with. Use caution with anything you try and stop using anything that you end up having problems with.
I've been tossing around in my head the idea of starting to type up some of the meals I make when I'm having some intestinal issues. Even when I'm feeling good I still kinda watch what I eat, lest problems arise.
Sorry, I get a little long winded when it comes to food.