Saute sausage and onion together in a large (at least 6 quart) pot until sausage is browned.
1 pound Italian sausage, 1 onion
Stir in carrots and garlic, and cook, stirring another minute until sausage is done through, and carrots have softened slightly.
¼ cup minced garlic, 1 ½ cups sliced carrots
Drain sausage if needed, then place back in pot.
Add beans, oregano, basil, salt, and pepper, and chicken broth, and stir to combine.
45 ounces great northern beans, ½ teaspoon oregano, 1 teaspoon basil, 1 teaspoon salt, 1/4 teaspoon pepper, 4 cups chicken broth
Place lid on pot and bring to a simmer.
Simmer 10-15 minutes, until carrots are tender.
Remove lid and add milk and kale.
2 cups chopped kale, 1 cup half and half
Stir until kale is wilted, this should only take 30 seconds to a minutes.
Remove from heat and serve.