Slow-Cooker Indian Spiced Lentils

Ingredients:
2 cups red lentils
10 ounces spinach (fresh and chopped or frozen and thawed)
1 15-ounce can diced tomatoes
1 onion, chopped

1 carrot, chopped

2 potatoes, chopped

1/2 head cauliflower, chopped (optional)
1 tablespoon minced garlic
1 tablespoon minced fresh ginger
4 cups vegetable broth
1 tablespoon curry powder or paste
1 teaspoon mustard seeds
1/2 teaspoon ground coriander
1/2 teaspoon ground cumin
1/8-1/4 teaspoon cayenne pepper
1 teaspoons sugar
1 teaspoons kosher salt
Juice of 1/2 lemon or lime
Handful of chopped cilantro, plus more for garnish if desired

Instructions: 

Combine all ingredients except for the lemon (or lime) juice and cilantro in the pot of a slow cooker. Cook on high for 3-4 hours or on low for 6-7 hours (or bring to a boil on the stove top and then simmer, covered, on low for 1 hour). Before serving, add the lemon juice and cilantro. This is delicious served over rice.

Recipe from http://www.ourbestbites.com/2012/11/slow-cooker-indian-lentils/