Lightly coat with a little more oil spray on top and bake for 10 minutes or until slightly brown on the bottom.
Remove from oven.
Using a tostonera (a press), slightly mash each piece to about a quarter of an inch thick. If a tostonera is not available, insert the pieces between a folded piece of brown-paper and press down using a saucer or the bottom of a glass jar.
Lightly re-spray the baking sheet and place the plantains brown side up onto the baking sheet.
Lightly spray the top and bake for another 15 minutes until golden brown and crispy.
For the Mojo:
Heat a small sauce pan on low flame, when hot add oil.
Saute garlic on low for about 2 minutes, do not brown.
Add sour orange, oregano, cumin, salt and pepper and let it come to a boil.
Shut off and set aside to cool to room temperature.