Thoroughly mix together the ground beef, beef hearts, and beef livers in a large bowl.

Grind the chicken necks in a food processor or grinder until they are finely chopped, and then add them to the beef mixture.

Add the oil to the mixture and stir until it is evenly distributed.

Add the green beans and peas to the mixture and stir until they are evenly distributed.

Crack the egg into the mixture and stir until it is fully incorporated.

Portion the mixture into individual servings and store them in airtight containers in the fridge or freezer until ready to use.