The What Mummy Makes book/blog has lots of simple stuff that has that “easy carb” vibe without being UPF. A lot of it variations on cheese + egg + veg theme, but at least actual foods, that are quick to make. I can’t imagine any child objecting to most of the recipes too much, they’re not particularly challenging iykwim.
I also use the slow cooker a lot. Bored Of Lunch again is lots of palatable recipes that just work. He doesn’t faff around with browning meat first etc either which I really appreciate.
Salmon steaks brushed with honey and wasabi, under the grill for 20 mins, with rice and frozen veg, splash of soy sauce.
Soups in the soup maker.
Baked potato with cheese/tuna etc
I keep the freezer stocked with frozen chopped onion, garlic, ginger etc, chopped butternut squash etc. Saves loads of time. Veg side for dinner is often frozen. It’s processed but not ultra processed. I struggle with time management and am not a great cook so I go for the easy wins. By taking these shortcuts we manage to mostly eat food cooked from scratch.