I've made a veggie chilli for some veggie friends who are coming for bonfire night and it tastes ok, but just ok. It's a bit kind of beans and lentils in a chilli tomato sauce type thing, but it's got no real depth of flavour to it. Was thinking that I need veg stock cube in it? Some red wine? Mushroom ketchup? Marmite? Needs a bit of umami but without meat how do I get it? Don't do an awful lot of veggie cooking so am a bit lost. Any help gratefully received.