Instructions

  1. Slice the squashes and dice the mushroom and onion.
  2. Combine the Alfredo sauce, pasta, crab, onions, mushrooms, squash, zucchini, parsley and pepper flakes in a large bowl and toss to coat.
  3. Transfer mixture to a greased 13x9x2 baking dish and cover with cheese.
  4. Cover and bake at 325°F for 35 minutes.
  5. Toss bread crumbs and butter and sprinkle over casserole.
  6. Bake uncovered an additional 5 to 10 minutes to brown.