Slow Cooker Lentil Chili with Black Beans

In a 6 to 8 quart slow cooker, combine Red Onion (1), {@10:}, Chili Powder (1 Tbsp), Ground Cumin (1 tsp), Smoked Paprika (1 tsp), Sea Salt (1/2 Tbsp), Diced Tomatoes (2 cans), Brown Lentils (1 cup), Canned Black Beans (1 can), Unsweetened Pumpkin Purée (1 can), {@11:}, and Vegetable Stock (4 cups).

Cook for 6 hours on low heat, or until the lentils are tender.