Preheat oven to 400 degrees. Line a baking sheet with either aluminum foil or a silicone baking mat. Spray with olive oil or cooking spray. Add chopped broccoli to baking sheet and roast in the preheated oven for 15-20 minutes or until soft.
Meanwhile bring a medium pot of salted water to boil, and cook pasta according to package directions. Drain and set aside.
Heat oil in a large skillet over medium heat. Add onions and cook for 5 minutes, or until soft. Add in minced garlic and cook for 30 seconds, until fragrant. Whisk in flour and cook for 1 minute, then gradually whisk in milk, stirring constantly until mixture has thickened. Remove from heat and stir in cheese until melted and creamy. Season to taste with salt and pepper.
Carefully mix in macaroni, ham, and broccoli.
Place mixture in a large baking dish and sprinkle panko over the top. Place under broiler and bake for 3-4 minutes, or until top is golden brown.
Macaroni and Cheese with Ham and Broccoli - Ideas for the Home by Kenarry®