This recipe is my modified version of the original (http://www.food.com/recipe/egyptian-red-lentil-soup-94673)
5 c. water
1 bullion cube
1 c. dried lentils
2-3 frozen onion squares
4-5 frozen garlic squares
2 med. butternut squash, peeled and cut into mashed potato sized pieces
2 t. ground cumin
3 t. zatar
salt & pepper
Add water, bullion cube, onion, garlic, squash, & lentils into a large soup pot. Cover and bring to boil. (Be careful because it will overflow the pot just like potatoes do when cooking them.) Lower heat and simmer 15-20 minutes or until lentils & veggies are tender. Remove pan from heat.
In a frying pan, place dry spices in an unoiled pan. Toast spices. Stir frequently to prevent burning. Once toasted, set aside and let cool for a moment.
Place spices into soup and then begin pureeing the soup. I puree small batches in my blender. Just be careful because the mixture is hot and if you put too much in your blender it will explode on you. I only fill my blender about 1/3 full each time.
Once soup is ready, add salt & pepper if needed.
I would think this soup could easily be made in the crockpot although I have never tried it.