Cut several slits into fatty skin of duck breast. In a skillet over med. heat, fry skin-side-down for 10 min. Flip & continue to cook in its own fat for 10 min. more. Remove from pan. Carefully remove skin using a sharp knife, then slice; set aside.
Meanwhile, in a separate skillet, cook onions in olive oil over med heat until translucent & soft, about 5 min. Mix in honey; continue to cook until brown and fragrant, 5 to 7 min. more.
Spread goat cheese evenly over pizza crust. Season with salt & pepper. Then layer with caramelized onions, fontina cheese, duck breast slices and rosemary.
Bake in preheated oven until cheese in center of pizza is completely melted, about 10 min.