Preheat oven to 400°F.
Preheat a medium-size skillet with 2 turns of the pan of EVOO, about 2 tablespoons. Once the skillet is hot, add the sausage and break it up with the back of a wooden spoon into small pieces. Cook until brown, about 4-5 minutes. Remove from the skillet with a slotted spoon to drain on a paper towel-lined plate and reserve.
In a medium-size mixing bowl, combine the garlic, the cheeses, thyme and lemon zest, and season with a little salt and pepper. Add the reserved sausage to the bowl and a pinch of freshly grated nutmeg. Mix thoroughly to combine.