Hamburger Beef Soup {Low Carb / Keto}

Name: Hamburger Beef Soup {Low Carb / Keto}
Cuisine: American
Ingredients: 1 lb (450g) lean ground beef; 1 tablespoon olive oil; 1/2 cup onion finely diced; 2 stalks celery thinly sliced; 3 cloves garlic, halved; Salt and fresh cracked pepper to taste; One 15 oz (425g) can diced tomatoes (no need to drain), or diced fresh tomatoes; One 8 oz (225g) can tomato sauce; 1 teaspoon Italian seasoning; 5 cups (1 1/4 l) beef broth; 1/2 cup diced green beans, fresh or frozen; 2 tablespoons chopped fresh parsley, optional; Shredded cheese, for garnish (we used sharp cheddar)