pan fry some chopped garlic, onion, celery and carrot until soft. add the lentils, bay leaf, thyme. add some veg stock (the pack should tell you how much water you need for the lentils). cook until lentils are tender.
this is really nice with a piece of poached or pan fried cod and some green veg, and it is really healthy too!
alternatively it is great with sausages (i posted about sausages yesterday and ended up making something very similar to catrin's suggestion on here