Day 1: 

Marinate the brisket in a pot with the onions and coke. Let it marinate for at least 10 hours or overnight. 

Day 2: 

Get a baking pan and make a foil T in the pan with some dampen parchment paper on top.

Remove the brisket from the marinate and place on parchment paper. 

Rub the onion soup mix all over the top of brisket. 

Then in a small bowl mix the ketchup, water, honey, garlic, pepper and salt and pour over the brisket.

Place another dampened parchment Paper over the brisket and then fold the foil over and tightly seal the brisket.

Bake on 300F for a minimum of 4 hours – longer if your brisket is  slightly bigger 

Remove, slice and eat!