Slow Cooker Vegetarian Minestrone

•  
• 2 cups vegetable stock
• 1 1/2 cups water
• 1can diced tomatoes
• 1 cup diced celery (3 stalks)
• 1 cup diced carrots (2 carrots)
• 1 cup diced onion (1 small)
• 1 Tbsp chopped fresh parsley (or 1 tsp dried)
• 2 bay leaves
• Salt and freshly ground black pepper, to taste
• 1 1/3 cups shell pasta
• 4 cloves garlic, minced
• 1  can dark red kidney beans, drained and rinsed
• 1 can cannelloni beans, drained and rinsed
• 2 cups slightly packed chopped fresh spinach
• Finely shredded Parmeson cheese, for serving (Parmesan works too)