Tea bags, some instant coffee, hot chocolate & sugar sachets. Milk, eggs, cheese & some kind of spread in the fridge. A loaf of uncut bread from the local baker's, an unopened jar of jam/marmalade/honey, a fresh cake and/or biscuits, a small bowl of fresh fruit. If your budget extends to it, a tub of fresh soup, a bottle of wine and a carton of fresh juice and maybe a box of everyday cereal.
It's a good idea to ask people's dietary preferences when they book, as you could waste a lot of money on meat, fish, cheese, etc if they're vegans. I hate having to throw food in the bin, whether it's vegetarian or not, and I'd feel uncomfortable trying to give it away to neighbours!
You can get vegan versions of just about anything now, or alternatively, leave a small punnet of fresh mushrooms instead. Just a small personal preference of mine: don't bother with vegetarian bacon or vegan cheese - imho, nobody has yet invented a decent version of either. You can get vegetarian cheese (made without animal rennet) but you'd need to check the ingredients list carefully.
Already-opened bottles and jars (sauce, jam, etc) are a no-no for me, as is sugar, coffee and other loose dry foodstuffs decanted into small containers. I just don't care to use other people's leavings!
I do love to see local produce - we were once left a beautiful little selection of sweet & savoury pastries made by a lady down the road - that alone charmed us into booking a return visit before we left!
Finally, it's a nice personal touch to include a small hand-written welcome card (with directions to the nearest shop so they can stock up on whatever else they need).
Of course, you'll factor all this into your rental tariff - you don't need to make a huge profit on the food but you don't want to lose money on it either!
Hope this helps and good luck with the business!
