Healthy Lentil Soup

Name: Healthy Lentil Soup
Prep time: 10 min
Cook time: 35 min
Total time: 45 min
Cuisine: European, Moroccan, African
Ingredients: 1 stalk celery diced; 1 carrot diced; 1 onion diced; 3 cloves garlic minced; 6 cups chicken broth or vegetable broth for a vegetarian alternative; 15 ounces diced tomatoes undrained; 1 1/2 cups lentils rinsed; 2 bay leaves; 1/2 teaspoon dried oregano or 1 teaspoon fresh oregano, chopped; salt to taste; pepper freshly ground, to taste; 4 cups spinach leaves