Place the rest of the ground chuck in a large bowl to make the meatballs and meatloaf . They can be frozen for up to three weeks or kept in refrigerator for three days.
If you have frozen the meatloaf, take it out of freezer the night before you are planning to use it and place it in the refrigerator overnight. Before you are ready to heat it, let it stand at room temperature for one hour. Cover the top well with foil and set it in a preheated 400° oven for 30 minutes.