Paleo, primal, and raw foods diet blogs have been a good source of grain-free recipes, along with some of the SCD and GAPS diets blogs.
What I've learned doing this for a couple years:
1. The extras make a huge difference. I have a limited diet, which gets REALLY boring after a while. So since I can't change my limitations, I now make sauces, condiments, dips, spreads, veggie-based 'croutons' - anything to change things up, so that it doesn't feel like I'm only eating that one same food. :-)
2. Oil + nuts + an herb = a pesto sauce. You can add cheese if you have dairy, but playing around with herbs and oils and nuts (or even oil and herbs) can get you some great combinations. You can use some veggies in the mix, too. Asparagus pesto, basil and lemon thyme with pine nuts, broccoli and walnuts, oregano and hazelnuts. Lots of good stuff.
3. Most veggies can be steamed/boiled/roasted and blended up in the blender to make the base for a sauce or dip for meat, beans, even other veggies. Or a base for a soup. Roasted eggplant and roasted onion go great together, for example.
4. An herb garden is a life-saver. About 6 months into the diet, I started an herb garden. It's the best thing I've ever did with re: to food. It's usually faster to buy a small herb plant, but you'll get more bang for your buck if you buy seeds. I buy any herb that is edible, even if I don't recognize it and have to go look it up once I get home, but I don't think there's been an herb I've regretted purchasing - they all taste good with something, and oftentimes it's something I never ate before so it's worth exploring.
5. Some nice veggie noodles: get a julienne peeler and peel a zucchini, yellow squash, carrot, etc... length-wise until you have a lot of little noodle-like strips. Let them sit in open air (usually in the fridge) for a few hours until they are limp. Then boil them briefly and you have veggie noodles. I always thought the carrot ones would go well in chicken soup. :-)
6. Comfort food helps. I found one or two foods I really, really like, and I make extra whenever I make them so I can have a small store in the freezer. If I'm feeling down, or the diet is feeling really frustrating, having that 'nice' food to break out is really nice for my mood. I think it helps stick to the diet when your having a crummy day, you know?
7. Keeping track of nutrients has been important for me as well. Without the grains, it's sometimes hard to make sure I get enough of the nutrients that are plentiful in grains, so it's something to be aware of.
So far, this diet has worked for me quite well. Hope it works well for you, too. :-)