cheesy sausage and ham potatoes with olives

Ingredients

• 10-12 large red or yellow potatoes cubed
• 1 small onion diced
• 1/4 large red or green pepper diced
• 2 sticks celery with leaves diced
• 1/3 cup green olives sliced
• 1/2 pound cooked breakfast sausage crumbles
• 1/2 cup ham cubes
• 1/2 pound swiss cheese cubed
• 1 cup cheddar cheese shredded
• 1/2 pound velveeta cheese cubed
• 1 cup colby cheese shredded
• 2 tablespoons flour
• 1/4 cup butter
• 1 teaspoon salt
• 1/2 teaspoon pepper
• 1 teaspoon garlic powder
• 1 teaspoon rosemary
• 1 teaspoon onion powder
• 1/8 teaspoon basil
• 2 tablespoons parsley
• 1/2 teaspoon celery seed
• 1 1/2 cups whole milk