Is there a basic custard recipe for fruit puree to be added into to make into ice cream?

According to this query, is there a basic custard recipe where fruit puree can be added into to make into different varieties of fruit ice cream?

Well, yes and no.

And here's the "Yes" answer:
To make a basic custard recipe, you need:
1 egg yolk
50ml milk
50ml cream
15g to 20g sugar

Basically, this basic custard is good for fruit flavours and you should preferably only dump in frozen fruit puree (such as those found in Phoon Huat). Try not to use canned fruits because they tend to be less flavourful and taste more syrupy than frozen fruit puree that have not been treated in heavy syrup.

And here's the "No" answer:
Not all fruits are created equal. So, if you were to, say, mix in fresh watermelon into your custard, you WON'T get nice ice cream at all. The watermelon is too moist and will result in a pretty mild and icy concoction.

But it you were to toss in fresh durian flesh, maybe you stand a chance of having a pretty decent and strong flavoured ice cream.

So, the all important question: How much fruit puree should I use? Well, there is no hard and fast rule. Use as much puree as you like. It's really up to personal preference.