Preheat your oven to 350 degrees.
In blender or food processor, blend beans and milk, butter eggs, sugar, nutmeg, cinnamon, vanilla and flour until smooth.
If using a stand mixer, start with your butter and sugar. Mix until well combined and add your spices, vanilla and flour. Next add your pureed navy beans and mix until light and fluffy. Add eggs one at at time mixing in between and then add your half and half or evaporated milk. Mix well. Bake for one hour or until set.
You can use evaporated milk or half and half.
Sugar can be all granulated, all brown or a combination.