cheesy baked shells and broccoli

i'm always on the hunt for new, yummy mac & cheese recipes, and this is one of them. if i'm remembering correctly, i got it out of a kraft foods magazine.

3/4 lb. medium pasta shells, cooked (about 5 cups)
1 tablespoon butter
2 tablespoons flour
2 c whole milk
2 c grated cheddar or gruyere, divided (8 oz.)
1/8 teaspoon nutmeg
3/4 teaspoon kosher salt
1/4 teaspoon papper
16 oz. bag frozen broccoli florets, thawed

heat butter in large pot over medium heat. add flour and cook for 2 minutes, stirring constantly. whisk in milk. stir occasionally until slightly thickened (4-5 minutes). add 1 1/2 c cheese and stir till melted. stir in nutmeg, salt, and pepper. add pasta and broccoli and toss to combine. transfer to broilerproof 1 1/2 quart pan (8 inch square). sprinkle w/ remaining cheese. broil until golden brown (3-4 minutes). serves 4.