How many different fruits and veggies do you feed your infant?

We have just started my son on solid foods. He wasn't like the rice cereal so we started mixing it into a little bit of the gerber apples and he is doing pretty good with that. We planned on starting to give him that in the morning and starting him on some squash around dinner time. My question is how many different kinds of fruits and veggies do you alternate with your infant? Like do feed them apples everday or once you know they are ok do you mix it up and give them a variety like apples one day and then pears the next?