Tunisian Tomato Soup with Chickpeas and Lentils

Ingredients
1 15-ounce cans chickpeas
1 cup uncooked lentils (any kind), rinsed and picked over
1 cinnamon stick
2 Tbsp olive oil
4 cups minced onion
2 Tbsp minced garlic
2 tsp salt
1 tsp turmeric
1 1/2 tsp cumin seeds
2 tsp ground cumin
2 to 3 bay leaves
1 28-ounce can crushed tomatoes
black pepper and cayenne to taste
3 Tbsp fresh lemon juice (or to taste)