We actually keep a pantry pretty well stocked with basics:  tea, coffee, cleaning supplies & laundry stuff, cup of noodles, ramen, soup, oatmeal packets, microwave popcorn, spices, bottled water, lemonade mix/crystal light, etc.  

Too many lumps in your oatmeal, dang right it's "THERE" fault.

He went out for another issue and he said yep, they were using that tub and the stink is because they put organic oils, fresh flowers and leaves, needles in the tub along with apparently oatmeal. 

I do like to provide some extra items which guests appreciate immensely: my welcome basket has some instant oatmeal pouches, granola bars, microwave popcorn and a couple of little chocolates and some fresh fruit.

I ate oatmeal 2-3 times a day and did not own a television set.  

He ate Ramen noodles and oatmeal every day.

I spent many a month trying to figure out new ways to enjoy ramen and oat meal because that was all I could afford.

. - my routine is wake up, shower, eat either 4 whole eggs or 6 egg whites (depending on how im feeling), 1/2 cup of oatmeal with cinnamon in it, and a small side of fruit.

Hate oatmeal to this day unless it's in a cookie. 

Just out of curiosity, you might want to find out if the tenant has been putting rice, pasta, noodles, oatmeal or any other starchy item down the drain (as in rinsing out their oatmeal pot every morning).