Step 1:
Prefold in half over these four lines.

Step 6:
Bookfold one edge to the left

Step 5:
Press / fold these edges downwards over the prefolded lines.
Repeat step 3 to 5 on the backside.

Step 2:
This is the other side of the paper.
Fold over the two lines at the bottom right, then over the two diagonal lines. And then over the two lines at the top left.

Step 4:
Fold over the pink line.

Step 3:
Prefold over these two lines.

Step 10:
Close the edges by folding over the two pink lines, use glue if necessary.
Do the same on the backside.

Step 8:
Fold both purple edges sidewards, to reveal the green side of the paper.
Repeat on the other three flaps.

Step 9:
Fold the four flaps downwards and rotate the model 180 degrees, see next photo.

Step 7:
Fold the flap upwards.
Repeat step 6 and 7 on the backside.

Step 16:
Glue these two edges together.

Step 15:
Fold the four upper flaps outwards.

Step 12:
Valley-fold this prefolded line to the left.

Step 11:
Fold over this pink line, fold over all paper layers in one. Open the layers afterwards, see arrow.

Step 14:
Fold on the four edges at the bottom.

Step 13:
Open the model, using something like a pencil makes it easier.

Step 17:
Glue the other two edges to the model.

DONE!
This is a DIY-video fior making the aubergines: