Step one:
First draw a tilted oval.
Step 2:
Then draw a semicircle below, paying attention to the raised shape in the middle.
Step 3:
Then inside the oval, use the corners of arcs to draw the structure inside.
Step 4:
Use arcs to connect them one by one.
Step 5:
You also need to add some small decorative points inside.
Step 6:
Finally, apply a nice color and the lemon is finished.