To make sausage , whisk the spices together in a medium bowl first. Add the sausage to the mixing bowl and work the spices into the sausage until evenly mixed in.
Then gradually mix in the yogurt with a spatula until you start to form dough (do not overmix or the biscuits won’t get as fluffy! There should still be flour in the bowl).
Place on the baking sheet. Then brush the tops of the biscuits with the egg wash (just whisk egg in small bowl). Bake for 10-14 minutes or until golden brown to your liking.
To assemble: cut the biscuits open, add some yellow mustard (or condiment of choice) then add the breakfast sausage and top with the other half of the biscuit.