Salmon or chicken with rainbow rice (small cut bright coloured veg the on in the pan with rice & a stock cube (Kallo as gf&df))
Mine won't eat veg on a plate, but will eat it if it's 'in' something, hence rainbow rice (but not to often!) or spag bol/chilli & beans (never are they runny sauces, more not-quite-dry!)
Fritters/pancakes are great for sides/snacks/lunches. (Grated potato & any veg you can hide in there or grated veg in pancake batter & make as thick 'American' style pancakes or grated Apple/pear or berries to make sweet pancakes as puddings/snacks. I've recently started making waffles instead of pancakes (curtesy of Aldi deals!) which my two love!)
Both will freeze, pancakes/waffles defrost in a toaster.
Sausages & mash (or normally just mini potato waffles in our house!)
M&S sausages are all gf, some of the tesco finest ones are too, every now & again aldi do their gf big sausages (they are at the mo)
I get the chipolatas from m&s, Cook them & cut inhalf into a muffin tray, pour Yorkie batter on them & make mini-toads for the boys.
They freeze well too, so can be brought out for them if our meal doesn't suit.
Roasts are popular too, most meats, veg&spuds boiled or roasted. Watch your gravy though (mine just prefer ketchup!)
Fish fingers, mini-waffles & salady stuff or beans is a too-frequent meal in our house as it's quick but more importantly it always gets eaten!
Omelette with bits in, makes a nice lunch at the weekend :-)
Mattessons pork sausage is a saviour in our house!
Stir fry with rice or rice noodles (Amoy straight to wok are really easy & quick!)
Getting my two to help chop the veg (& allowing them to eat it raw (if they can obviously!) has improved the variety & quantity they eat in the meal itself. They eat more of the stir fry veg raw off the board than they do as the finished meal, but they've eaten it, so I'm not too bothered :-)
Hope you get some ideas from this lot...