You can make mummy dogs (hot dogs wrapped in bread stick dough and baked. I pipe eyes on the mummie with black icing gel). Use some premade pie crust and cut out halloween shapes (2 per shape; 2 tombstones, 2 bats, etc.), fill them with taco meat, top with the other shape, seal closed and bake. You can paint them with egg yolk paint if you want. You can also make English muffin pizzas, and let the kids use pepperoni, peppers, cheese, to make jack-o-lantern faces.
For dessert, decorate pre-made cupcakes to look like scarecrows. Make jell-o with gummy worms in it. Make any kind of pudding that you like in clear cups (can be done ahead of time). Just before serving, put some Cool Whip in a pastry bag (or Ziplok baggie with a corner snipped off), and pipe some "ghosts" on top of the pudding.
I like to make orange jell-o in one pan, and grape jell-o in another. Flake them up with a fork, and spoon an orange layer into a clear cup, then a purple layer, then an orange layer, etc. Before serving, pour 7-Up or orange Kool-aid over it. Add a straw and you have Goblin Goo!
Somewhere I have a recipe for chili cooked inside a pumpkin. I'll look for it, if you want. I've never tried it, so I can't vouch for the taste, though.