1 In a Dutch oven, combine broth and vegetables. 2 Cover and simmer until vegetables are tender, about 20 minutes. 3 In a saucepan, melt butter; stir in flour. 4 Gradually add milk; cook and stir for a few minutes. It will not thicken. 5 Stir into vegetable mixture. 6 Add ham, pepper, and thyme; heat through.