Easy Slow Cooker Lentil Soup - Real Food Whole Life

Ingredients

• 1 medium yellow onion, chopped
• 1 cup chopped celery
• 2 cups chopped carrot
• 2 cloves garlic, minced or finely grated
• 2 teaspoons kosher salt, divided
• 1 ½ cups dry green lentils (or brown lentils), rinsed and picked over
• 1 (15-oz) can petite-diced tomatoes
• 6-8 cups vegetable stock, or chicken stock (if not vegetarian)
• 1 large bay leaf, or 2 small bay leaves
• 4 cups baby spinach
• 1 teaspoon red wine vinegar