Drizzle a little olive oil into a heavy bottomed pot or dutch oven. Saute the garlic until fragrant, then add the onions, carrots and celery. Cook vegetables until they begin to soften. Add the water and bouillon or broth and increase the temperature to medium-high until the water is almost at a boil. Add the spinach and parsley to the soup with your choice of seasonings and stir until the leaves are wilted. Add the tortellini and cook according to package directions (about 9 minutes). Serve sprinkled with parmesan cheese.