We made these with ground pork last week and they were delicious! (onelovelylife.com)
You just combine 1 pound ground pork a teaspoon each of fennel seeds, dried sage, garlic powder, salt and a little pinch of red pepper flakes. (tasteslovely.com)
Another twist is doing a 50/50 mix of ground pork with ground beef. (epicurious.com)