I'm not sure if you can really eliminate all odors associated with cooking something with weed inside. However the smell will be temporary as opposed to the smell left by smoke. Possible ways to mask weed cooking smells are micro wave popcorn, frozen pizza, cooking something with a lot of garlic and onions on it. Maybe even burn your cooking a bit so you can explain what "that strange smell is". Time your diversionary recipe to finish cooking after your weed edibles have cooked.

Use the vent above the stove if you have one. Open any door or window that you can while things cook and for a little while after. Ceiling fans should run on high.

Firecrackers wrapped in foil don't put out much of an odor, and if you take them out side to unwrap them from the foil, that much less. (search for recipes) they are also probably the simplest single dose edible you can make.