I don't have anything against lentils. But some of the Squirrelings, in spite of my cajoling that Esau sold his birthright for a bowl of lentil soup, have remained unconvinced, especially when it comes to soup. (Sprouts are okay.)
If you have reluctant lentil eaters, here are a couple of tips for improving your soup score:
Reduce the overall lentil content. Aim for more of a vegetable soup than a straight lentils-with-liquid thing. It helps if you cut the vegetables big enough so that they don't disappear into the lentils; the idea here is variety.
Work out a lentil-compatible flavour that your family already likes. Might be Italian, pizza-flavoured; might be Middle Eastern; might be Tex-Mex. Even a hot-dog, wieners-and-beaners kind of thing.
Here's a sample recipe that went over pretty well today. The amounts are vague since I was just throwing things in the pot.
Lentil-Vegetable Soup with Salsa
3 cups chicken broth plus an equal amount water
Some green lentils--maybe half to two-thirds of a cup dry;
2 carrots, sliced
1/2 bunch celery, including some leaves, sliced
Rinse the lentils and check for pebbles. Bring the broth and water to a boil, and add the lentils and vegetables. Turn down the heat and simmer until the lentils are soft enough to eat and the vegetables are cooked. I poured in some mild salsa partway through--maybe half a cup, just enough to season it up and add a bit of onion and tomato. Add more water if it needs it as it's cooking.
Serve with bologna sandwiches and Coffeemamma's Rhubarb Muffins. Or whatever else you have.