Do your DSC eat different meals to your own DC? We eat fairly healthily. Meat lots of veg and fruit 99% of meals made from scratch. DSC only eat oven food. Comments like "urgh whats that" (to slow cooked lamb with carrots and potatoes) and food being pushed around the plate. DH has been just as bad but getting better.
Don't think I'm cooking anything exotic? Just bog standard meals. Or what I think are bog standard meals. Casserole. Risotto. Pasta. Roast dinners. Lentil soup. Chilli. Enchiladas. That sort of thing. My DCs eat a large range of food in part due to exMIL being Italian and introducing me to new foods which I've then continued cooking myself. Apparently my kids are odd because they eat most food without complaint. Just putting it out there for other opinions. I never say anything to DSC, by the way.