chicken gnocchi soup recipe

Ingredients 2 tablespoons olive oil 1 small onion, chopped 2 cloves garlic, minced 1 cup carrots, peeled and diced 1 cup celery, diced 4 cups chicken broth 2 cups cooked chicken, shredded or diced 1 package (16 oz) potato gnocchi 2 cups fresh spinach, chopped 1 cup heavy cream