Let Them Eat Junk
If your child insists on having a McDonald's burger and fries for dinner every Friday, let them have it once in a while. However, gently explain to them that they must eat a nutritious meal the next morning to make up for it.
For the next healthy meal, you can consider oats cooked in milk with their preferred nuts, fruits, or berries. In addition to helping clean up the digestive system, the soluble fiber in oats will provide your child with enough nutrients to make up for the previous day's lack of nutrition. In addition to being a great source of protein and nutritious carbs, oats also include anti-inflammatory antioxidants and fiber.