These are awesome! So flavorful! I saved them to my recipe folder and would love to make them again. I used 1lb. ground pork and 1/2lb. ground beef (I had never used ground pork before), I added a little extra spinach (maybe 7-8oz.), and I needed a lot more breadcrumbs than called for to coat them (probably 1 cup instead of 1/4 cup). I don't have a kitchen scale so I just guessed how big to make them and I ended up with meat leftover after the muffin cups were filled, so I put the remaining meatballs on a cookie sheet. I liked baking them because they stayed fairly round. When I cook meatballs in a skillet they end up sort of square or triangle shaped. I think I'll try to bake my meatballs from now on!