Just had this for tea and it was so filling and warming!
1 onion chopped
2tins chopped tomatoes
2tbsp smoked paprika
2 tins kidney beans
Soften onions, add paprika and fry for a couple of minutes.
Add tomatoes and a can of water, bring to boil.
Add kidney beans and simmer til reduced down.
Really simple, really tasty and really cheap! It cost less than £2 to feed 3 of us!