delicious - with a very pleasant taste or smell.

tasteful - showing good judgment about what is attractive or suitable.

fresh -
1. fresh food has been recently picked, caught, or prepared.
2. recently done, made, or experienced.
Example: The details are still fresh in my mind.
3. [BEFORE NOUN] clearly new and different
We need a completely fresh approach to the problem.
The programme takes a fresh look at this difficult issue.

tasty (about food) - tasty food has a nice flavour.

tasteless -
1. having no flavour.
2. a tasteless remark or way of behaving is slightly rude or offensive and not suitable in the situation that you are in.
3. tasteless things such as clothes, furniture, or decorations look unpleasant or ugly.