Eating on a budge......t

so i like to cook ya, but its proving a rather expensive hobby. Take for example last nights din din, courtesy of Jamie. Coley korma. It was delicious but cost me £17 i don't quite understand how, also it only fed 2 people. So i'm going to try and budget and spend a max of £5 on ingredients to rustle up a delicious healthy meal. Good food has supplied me the recipes, i shall thus go on and try this experiment, that is until i walk past waitrose and end up spending £5 alone on a lemon. Worth it though, those lemons are like mucho tasty