Preheat the oven to 350 degrees F.
Place the whole acorn squash in a small baking dish. Place in oven and bake for 45 minutes. Remove and let cool.
Stir in the ground beef and cook, stirring until just brown.
Mix in the herbs and sprinkle with garlic salt.
Chop the squash flesh and toss with the ground meat mixture.
Stuff the hollowed-out acorn squash with the meat and cheese mixture. Replace them in the baking dish with the lids. (Reserve any extra stuffing for serving on the side)
Bake the squash at 350 for 20 minutes.
Slice each squash in half and serve. Use lids for decorative garnish.