This is partly a ratatouille, partly a borlotti bean stew, hence the portmanteau. I was inspired, once again, by a recipe from the wonderful Sarah Raven – her Garden Cookbook is my go-to for all seasons and ingredients. She calls this her ‘absolute favourite recipe for borlotti beans’, so I absolutely had to try it. I have tinkered and tweaked it; she uses fresh beans and tomatoes, as is her way; I use tinned, as is mine. Sarah uses fresh coriander in hers b