Slow Cooker Lentil Rice Soup

2 cups dry lentils

2 cups uncooked long grain brown rice

1 cup chopped carrots

½ cup chopped celery

½ onion, chopped

8 cups water

1 cup vegetable broth

1 teaspoon garlic powder

½ teaspoon ground black pepper

1 tablespoon salt

1 cup sliced fresh mushrooms

Place the lentils, rice, carrots, celery, onion, water, broth, garlic powder, ground black pepper and salt in a slow cooker.

Cover and cook on low setting for 7 to 8 hours. Stir in the mushrooms 1 hour before serving.