Beef with milk

1 1/4 cups fine breadcrumbs (I use gluten-free homemade or Ener-G brand) 1 small yellow onions or 1/2 medium yellow onion , chopped fine 1 teaspoon kosher[...]

500 g ground chicken (chicken or beef mince) or 500 g ground beef (chicken or beef mince) 1 large egg 3 tablespoons parmesan cheese or 3 tablespoons asiago[...]