Yes, I'm intolerant to 'everything' too. My diet (which I try to follow as best I can) is gluten-free, sugarfree, dairy-free and vegetarian seeing as meat is hard for me to digest too: it has the same effect on me as dairy products.
Here is what I do:
I usually eat a rice meal for lunch, mostly with a tomato-based stew or curry. I make stews with lady-fingers as well as with aubergines and potatoes. Else I eat paella rice meals, there are loads of different recipes for paella. I can't recommend rice enough - rice is easy to digest, is a wholegrain with plenty of fibre, and can be made to taste really delicious. Rice is the staple and main component of meals in most cultures around the world. It really is a life saver.
For dinner I usually eat either gluten-free pasta made with rice flour with a tomato sauce, or I eat oats, which are also wholegrain but not as tasty.
Occasionally I eat fish and chips as I can tolerate fish to an extent (but both fish and chips are always cooked at home).
As you can eat eggs, I recommend making omelettes. I used to make really simple omelettes with tomatoes and they tasted really nice.
You're probably going to have to learn to cook really well, if you aren't already a good cook. Most of these meals aren't available ready-cooked, and even if they are, they taste a lot worse than the ones prepared at home. Also, they'd most likely be filled with lots of additives which could irritate my stomach and upset my system, which I don't trust. You an buy Nairn's gluten-free oatcakes from most shops to eat just in case you don't have time to cook. Finally, I'd also recommend drinking peppermint tea after your meals.