One Pot Sausage Gnocchi Soup

Name: One Pot Sausage Gnocchi Soup
Cook time: 30 min
Total time: 30 min
Cuisine: American, Italian
Ingredients: 2 tablespoons olive oil; 12 ounces fresh Italian turkey sausage, removed from casing if necessary; 1 yellow onion, chopped (1 ½ cups); 1 tablespoon finely chopped garlic (from 3 garlic cloves); 1.25 teaspoons dried Italian seasoning; 1 (14½-ounces) can diced tomatoes; 4 cups lower-sodium chicken broth; 1 (16-ounces) pkg. shelf-stable potato gnocchi; 3 cups packed baby spinach (3 ounces)