Gradient’s parameters:

Blending Options>Stroke

Choose next step the Pen Tool (P) to draw a leaf on the apple’s top, which shape may be changed with the Convert Point Tool.

The layer’s parameters: Blending Options>Gradient Overlay

Gradient’s parameters:

Blending Options>Stroke

The Pen Tool (P) should be used for drawing a highlight on the made leaf, but the Convert Point Tool may be helpful in making the appropriate corrections on the highlight’s shape.

The layer’s parameters: Fill 0%
Blending Options>Gradient Overlay