last year I experimented with sowing supermarket dried kidney beans and amazingly got a lovely little crop
The biggest downside were the slug and snail damage to the young plants but they recovered well. Borlotti beans are a french dwarf variety and Blue Lake are a climbing bean (need poles) - leave the seeds to mature and dry in the pods to harvest at the end of the season, remove the seeds and dry well before storing and use for soups, stews and baked beans. If cooking red kidney beans, don't forget to soak overnight and boil the beans for a minimum of 10 minutes to destroy the toxin haemaglutin before using in recipes
What about broad beans - when picked young, the beans are lovely and tender and nothing like the big grey chewy things you used to see in frozen mix veg!
This year I'm growing pea bean (lovely red/white bicoloured seeds) but I may have left the sowing a bit late ... tons of flowers and very few pods at the moment so I can't say how they turn out or what they taste like.
This year I grew Waverex (petit pois) The only downside I found is that the pods are a bit fiddly to get the peas out (unlike other pea varieties which are much easier - unfortunately more peas got eaten raw than put in the pot
) And how about growing mangetout and sugar snap - I particularly liked Sugar Ann - which can be eaten raw and freeze well (also no need to pod so reduces preparation time) When growing peas it might be an idea to put pea sticks (twiggy sticks), netting or string between canes for the plants to grasp