Mash the tomatoes and put the butter in the microwave as long as it has melted.

Mix the butter and mashed tomatoes. Let it cool a little bit and boil for 2-5 minutes.

When you're boiling the mixture pour the same time water into there slowly.

When the tomato mixture cools for 10 minutes, you can fry the steaks. Add pepper and salt as you like.

When the tomato mixture has cooled (dont let it cool too much) pour the rest of the ingredients in there and boil for 1-3 minutes.

Chop the onions/garlic gloves and make sure to fry them well. (So they wont taste raw and awful)

Add the pepsi to the steak and boil the sauce once again for 3 mins. Put the potatoes in the oven for an hour, pour the sauce on the steaks, put the potatoes on and voila!