Tender, moist cake made with a whole orange.
Preheat oven to 350F (180C) and grease the bottom of a nine-inch pan and line it with parchment paper.
Place the orange pieces and sugar in a food processor bowl and process until smooth, about one minute.
Add the olive oil and process.
Add the eggs, one at a time, and process until smooth.
Mix the flour, cardamom, and baking powder in a medium bowl. Add it to the orange mixture and pulse 3 times.
Pour the batter into the greased pan and bake on the medium rack shelf for 45-50 minutes. Or until a toothpick comes out from the center of the cake with a few moist crumbs.