I'm a foodie and feel your pain.In fact 4 of us in my family are foodies,1 is fussy
I posted on the other thread and have non identical twins(now 7).1 is fab as is my other child but twin2 was/is exactly the same as your 2.
I handled it exactly the same as you.I had a strictly no fuss,no alternatives approach and it works to some degree. I also had/have an unlimited fruit bowl.
My fussy eater has a healthy varied diet however he still refuses to try new things other than a nibble(I'm happy with that as previously he'd gag if trying anything new). My one rule is limited trash but he has treats, the occasional MD,sweets on special occasions. He never demands trash but interestingly anything not good in vast quantities he'd love.
I just stuck to our 3 healthyish meals a day,mostly ones he liked/tolerated with a thing he didn't sometimes as a side. There was always at least half a meal he'd like.I never made him eat the lot but if he had a good bash he'd get pudding if we had them which we rarely do. He'd go to bed hungry sometimes.
However now he'll grudgingly eat things he doesn't like eg plain rice(I think because he knows that's all there is).
He loves all breakfast food-porridge,toast,fruit,cereal etc so no probs there.
Lunch gets a bit trickier as he likes humus (if it's at home with pitta bread),cheese, peanut butter,jam(no salad inside of any description,only carrot sticks).He only likes cheddar or parmesan so no cheese strings ,Baby Bel etc. Loves yog and most fruit.bread sticks and cream cheese.Hates flapjack or anything new I dare to put in. I let him have a choc crepe as a treat occasionally.They never have crisps much to his annoyance.
Tea he likes pasta with tom sauce(has only recently tolerated a few flecks of basil on his plate,previously painstakingly forked every fleck out),roast minus the veg unless it's carrots,sweetcorn and peas,cottage pie,fish fingers,jacket potatoes. Will now tolerate a mild curry if it's served with curry free rice,popadoms and mango chutney. Starting to tolerate rice with smears of curry on.
Basically it's all the foods he was weaned on that are safe to him. Thank god I did vary it a bit and do what you're doing.We all eat together but dp and I now get 2 meals alone when they have a school dinner so we can indulge in a Thai green curry or other foodie food.
Basically hang in there it does get better. It's different for you as your twins are identical so will have the same tastes,mine aren't hence I have 1 of each as genetically they're different. You haven't caused it they are who they are and I do think it must be hard for kids like this in a foodie house.I keep reminding myself when dtwin is at his most infuriating foodwise that he can't help it and I can't change him. Also he won't starve,he's my biggest child-very healthy weight. Interestingly his foodie twin is the skinny one.
Not getting stressed is a big help imvho,it really is pointless and when you look at what they're eating it really isn't half bad.