Just messing around with smoothie recipes. The red flecks in this come from the apple peel (my $20 blender left them in). A better blender might reduce these to a non-visible state, or you could just peel the apple first. Personally, I think they add character.
1 apple, cored and sliced
4 dates, pitted
3 slice papaya (1" slices), peeled and quartered
1 orange, juiced
1 lemon or lime, juiced
water to desired thickness
I used a hand juicer to juice the orange and lemon/lime and added enough water to the two of these to equal 1 cup of total liquid.
Then just dump everything into your blender and beat until smooth.
Add more water or juice if you like your smoothies thinner.