Vegetables boiled in water. Yep, that’s all it is, easy peasy. Making your own vegetable stock at home is one of the fundamental kitchen processes that you just have to do now and again. It’s so easy, it doesn’t use up much time and it’s basically impossible to overcook. And if you have left over vegetables, peering over the edge of the compost, it’s a super efficient use of them before they go. Now, although …