I use a pressure cooker for lentil and beans, and for root veg, often adding some fresh coriander with stalks to add to the flavour of the beans or carrots, or mint for potatoes or peas.
One of our favourite soups is a chilli and bean soup originally tbought in a tin from M&S. We make the soup now, using the ingredients from the tin label: tomatoes, various beans, onions, carrots, potatoes, red and green peppers, courgette (though I usually leave this out), smoked paprika, cumin, coriander, cinnamon, black pepper, garlic purée, salt, coriander leaf, chipotle chillies. ancho chilli powder, cocoa, ground oregano, bay leaves. Thicken with cornflour if necessary.
Obviously there are no exact quantities, we just use what we have on the day, with different beans for variety.