Boil cubed potato is salted, boiling water until tender
Once tender, drain potatoes reserving ¾ cup of water
Mash potatoes and set aside
Melt the butter in a large pot or skillet over medium-high heat
Add onions and cook 2-3 minutes or until translucent and starting to brown
Stir in garlic and cook 1 minute
Add ground beef and cook until starts to brown, stirring often
Add salt, pepper, spices, and herbs to the ground beef
Pour in reserved potato water, stirring to combine.
Continue cooking over medium heat for 30 minutes or until liquid has evaporated, breaking down meat so there are no large clumps
Stir in potatoes, mixing well. Mixture will be thick
Meat can now be placed in a pie shell with top crust and baked until crust is golden. Or use this filling in tarts. Or store for later.