LeNtiL SoUp with SwEEt PoTaToEs and SpiNaCh

1 tablespoon cold press organic olive oil
1 organic onion, chopped
3 cloves garlic, minced
1 organic carrot, diced
... 1 organic celery stalk, diced
2 small organic sweet potatoes, peeled and cut into 1/2 inch cubes
1 1/2 cups organic brown lentils
4 (15 ounce) cans organic vegetable broth
2 cups water
2 cans (15 ounce) diced tomatoes
2 bay leaves
1 teaspoon dried thyme
1 tablespoon chopped fresh rosemary
Salt and pepper, to taste
2 cups chopped fresh spinach