Slow Cooker Sausage, Spinach and White Bean Soup

Ingredients

• 1 tablespoon olive oil
• 1 (12.8-ounce) package of turkey sausage, thinly sliced
• 3 cloves garlic, minced
• 1 onion, diced
• 3 carrots, peeled and diced
• 2 stalks celery, diced
• 2 (15-ounce) cans of Great Northern beans, drained and rinsed
• 1/2 teaspoon dried oregano
• 2 bay leaves
• 4 cups low-sodium chicken broth
• Salt and freshly ground black pepper, to taste
• 3 cups baby spinach