This was my first soup-making experience, and I loved it! Soup-making is a mixture of inspiration and science, innovation and convention. And there's something nice about the harmony of having everything in one pot. So read, try, and taste, and lend me your thoughts on this or any soups.
Start by simmering a bag's worth of split peas, according to the package directions. Add 32 ounces of vegetarian vegetable broth. Add diced tomatoes, chopped celery, chopped carrots, chopped romaine lettuce, and at least 3 minced garlic cloves. (You'll want to add diced onion as well, but I didn't have any at the time.) Throw in a few bay leaves. Add salt and ground pepper to taste. Add ground cinnamon and curry powder to taste. The result is a beautiful medley of texture and flavor--sweet, savory, and warm.
This soup contains about 9g of protein and 200 calories per 1/2 cup. I served it with pasta, but I think something like barley might be nice as well. Also, if you want a thicker, creamier soup, you might try sour cream. It complements the curry and cinnamon flavors nicely.