This in one I make but I don’t use measurements. Onions and garlic chopped fry in olive (gently) or any oil you use until golden brown. Mix in spoonful of any flour add a good dash of Worcestershire sauce and mustard salt and pepper spoon of marmite. Vegetable cube or stock pot added to water if you want it darker add a drop or two of gravy browning or soya sauce. Let it simmer on the stove I add very fine bread crumbs or panko to give it some body. I finish off with toasted bread and cheese bubbling on top.