Cheeseburger Chowder

1/2 lb ground beef 3/4 cup chopped onion 4 tablespoons butter , divided 2 cloves garlic , minced 1 cup diced carrot 1 teaspoon dried basil 1 teaspoon dried[...]

7 -8 cups diced potatoes 1 small onion , diced 2 carrots , diced 2 celery , diced 2 cups water 3 cups chicken broth 2 lbs hamburger , browned and drained 1[...]