Cut loaf of bread to desired size and grill on both sides until crispy on both sides. Place aside.
Combine cannellini beans, feta, salt, pepper and a splash of good olive oil together in a mixing bowl and mash until smooth in texture. Add in chopped parsley and mix to combine.
Cut top and bottom off of each orange and with a knife cut away the out skin. Cut orange into supremes--making cuts along the membrane to make individual orange segments. Put the supremes into a bowl and squeeze the remaining juice from the leftover orange.
Assemble bruschetta with a spoonful of the bean puree on each piece of bread. Add a handful of arugula on top of each. Scatter some orange supremes on top and drizzle each bruschetta with orange juice and some salt.