Combine in crock pot:
1 mason jar of canned tomatoes
1 large bag of mixed frozen veggies.
1-2 small white potatoes cubed
1 pound of lump crab meat
3 cups of water
1 Tbs of Old Bay or to taste (I usually add a lot more)
Again this is my grandmothers fool proof recipe you can probably edit it if you don't have something. Just throw it all together and let it cook in the crock pot all day and you will have the best soup ever.
I'll try to edit later with a pic of the finished product but you get the idea.