This is what we had for breakfast in Bangkok (what you don’t see is the 1.5kg more of jackfruit in the fridge!)
You will want to get to the Thai markets early (between 5:30am to 7:00am) as that is when you will get local prices, and have a bigger choice of food. Don’t be surprised if they don’t want to serve you so early though as they don’t want to sell you fruit so cheap, but if you persist then they will give in.
In December, Thailand has plenty of great jackfruit, rambutan, durian and dragon fruit. Bananas were a little harder to find, but we did manage to get a few nice bunches of the tiniest kind, those are nice and sweet.
If you walk around you will surely find a food market close to your hotel (just ask the concierge). We stayed on Lang Luang road, and there is a great little market on that same street, just East of the Phadung Krung Kasem river, close to the Paris Theatre.
Rasayana may seem like it’s far from the centre, but its totally worth it, plus the sky train is really fast and a much more efficient way to travel around Bangkok. We travelled there everyday, and only occasionally ate at Siam Paragon when we were shopping.
A little advice – be careful with drivers in Bangkok, there is a big chance they won’t know where a particular restaurant is, so when they ask you “what is it, is it a restaurant?” don’t say something like “yes it’s a vegetarian”. We did that on our first night and got taken to a vegetarian restaurant – the only one the guy knew. After that we mostly used them to get to a particular train station.
Also, watch out for their sauces if you’re eating in a non-vegetarian place. It’s not uncommon for them to serve you fish sauce with your meal if you ask for it to be “vegetarian”, so you should double check things, or carry a piece of paper with some Thai words written on them (or even pictures). Better yet, stick with what you know – olive oil, soya or Tabasco.