I do a black bean chilli:
2 x tins of black beans, rinsed.
Onion, chopped
1 tbsp cider vinegar
Smoked paprika
Cumin
Maybe other spices, can't remember but whatever you have and you like will do. Cook on low for 8-10 hours. Eat with rice or in wraps, possibly with feta cheese or sour cream.
Also do a tagine, I'll try to remember how it goes, I've adapted the original recipe, stuff can be swapped in and out depending what you've got:
Sweet potato, chopped
Parsnip, chopped
Red onion, chopped
Carrots, chopped
2 x tins chopped tomatoes
1 x tin chickpeas, rinsed
Handful of dried apricots, chopped
Struggling to remember what spices, I have a feeling cinnamon, cumin and chili, probably a couple of teaspoons.
Eat with couscous probably. The chickpeas weren't in the original recipe but I didn't find it filling enough. Again, some feta cheese wouldn't go amiss at the point of service.
Both of these are pretty healthy, low in calories and can be made in batches in frozen to subsequently take to work. Thus they formed the backbone of me losing two stone on Slimming World a while back.