Preheat oven to 375. Prepare a baking dish with non stick spray or rub with a bit of butter.
Brown turkey in skillet over medium high heat. Set aside.
Prepare orzo in saucepan, according to package directions. Drain orzo and place into baking dish. Add ground turkey and broccoli florets to dish as well.
Return saucepan back to stove over medium heat with 2 T flour and ½ C milk, whisking often. Once it starts to thicken, slowly whisk in the rest of the milk. Once the mixture resembles a sauce, remove from heat. Stir in havarti, mustard, garlic powder, salt and pepper. Continue to stir until the cheese is melted.
Pour sauce over orzo, turkey and broccoli. Stir well to coat everything evenly.
In a small bowl combine paprika, bread crumbs, parmesan cheese and olive oil. Sprinkle mixture over the top of casserole.
Bake 20 minutes.