Nikkichik, have only just noticed this thread. Hope your restricted diet is going well and you're noticing the benefits?
Ds1 is dairy and soya intolerant and I'm currently avoiding wheat as I think it may be affecting ds2 who is breastfed. Due to reintroduce in the week before Christmas!!
I've been using quinoa or millet as a couscous alternative. Millet you can get from a healthfood shop, but quinoa is even available in Asda. Sainsburys also stock Belazu barley couscous in their Special Selection foods.
I often have millet porridge for breakfast (with rice milk) although it's not especially tasty so I usually stir in plenty of dried fruit to make it more appetising.
We eat loads of ricecakes and occasionally I get round to baking some gluten-free bread. If you make extra of evening meals the leftovers can be very useful (especially roast chicken or ham). We've also found that a few of the Sainsbury's Taste the Difference sausages are both dairy free and gluten free.
Baked potatoes with baked beans and/or goat's cheese are a good lunch. I know you said you didn't want salad suggestions but I have tuna salad with ricecakes quite a lot, enlivened by fresh parsley, sunflower seeds and capers. Or tinned sardines on ricecakes, with salad. I went through a phase of roasting peppers in large batches to add some variety to lunch.
Would hoummous be okay or are you not allowed garlic as it's from the same family as onions?
You could also try polenta, and the 'ready made' variety can be sliced and used as a kind-of bread substitute.
There are loads of gluten-free and easy to follow recipes here
hth