Copper is a key mineral that's important for growth in children and the development of connective tissue that is part of your joints. Copper is also necessary for energy production, helps in the metabolism of iron and helps keep your immune system healthy. It is extremely stable in vegetables and even with boiling only about 5% is lost.
Veggies are cheapest and tastiest when they are considered ‘in season’—so it pays to keep an eye out at your local shop for what’s in abundance.