Mix tomato paste with seasoning in a bowl. Cut mozzarella into two cubes.

Mix the ground meat well with the seasoning paste, until thoroughly distributed.

Divide the meat in two. Take one portion, and form a flattened ball around one cube of the cheese, so that the cheese is completely and evenly covered buy the burger. Repeat with the rest of the ingredients.

Heat a grill pan or fry pan over medium heat. When hot, put the burgers in it, and cook for three minutes, then lower the heat slightly, and cook another ten minutes.

Flip the burgers and cook another ten minutes until done.

Serve at once.