Here are some ideas for the grinder as well as new items which aren't in game:
Also this list is intended as a "down the road" list.
Gravel >> Sand or Dirt
Sandstone >> Sand
New Items for Grinder:
Olives >Grinder> Olive oil (Pick up oil with bucket, and depending on how many olives you put in from the start will determine how full the bucket is)
Coffea >Harvest> Coffe Beans >Furnace or grill> Roasted Coffee Beans >Grinder> Coffee Grounds
New Objects:
Drying Rack (Hanging and laying)
Food Press (maybe place items by hand or have it be a crafting station?)
New Items that would be nice to see these once cooking is being worked on:
Eggs from chickens
Milk from cows
Sugar Beets
Dried Meat aka Jerky
Apple Sauce
Apple juice
Herbs? Spearmint maybe? subtract the spreading like weeds part 
. Mint would have different growth meshes per stage.
Pumpkin pie (The sooner the better 
maybe have it craftable for now temporarily)
Anyways, that's all I can think of for now.
