"Spaghetti with meatballs (or spaghetti and meatballs) is an Italian-American dish that usually consists of spaghetti, tomato sauce and meatballs."
To open or eat the Spaghetti With Meatballs, one must have a sharp tool (such as a knife or axe) and the can of food nearby or in the inventory.
Select the sharp tool and the can with the left mouse button so that they are both highlighted red. Then, right click the can and select the "Open" option. Clicking with the right mouse button on an opened can of food should allow one to eat that food.