What's your starting point , stockcupboard wise.
I always have cumin, parsley, turmeric, chili garlic,soy sauce honey , basmati rice and pasta , lemons ( or lemon juice) olive oil and salt. With those basic ingredients or cheap to make risottos, stir frys, curries and pasta dishes with minimum ingredients (even if you have t got these in they are not expensive to buy.
I usually have frozen mixed veg in. It quickly makes soup, goes into casseroles or some stir fries.
Tonight I fried onions up added a little brown sugar and simmered for 20 mins. Added some cumin, chili flakes, salt ,turmeric, fried that added a can of lentils ( 48p) and stirred in some basmati rice. Served with flat bread I made with yogurt and flour.
Sweet potato and black bean chili is very simple and cheap to make ( the one by cookie and Kate is my favourite by a long way)
I'm quite God with leftovers for example any left over mash gets made into a fritter!
Make sure you eat seasonally.
Make your own curry paste and pasta sauces. It couldn't be easier and it's cheap.
How you present your food can make a huge difference to how you feel about it ( in my opinion). I try to make it look upgraded., drizzle of balsamic glaze on my cheese on toast, rocket and tomato garnish with my garlic mushrooms on toast that kind of thing.