Eliza nails it - don't buy the stuff at any price. I never buy processed food or pre-prepared meals if I can help it. You can make good burgers easily and quickly if you must have them.

There's always a lot of argument for and against processed food. The "for" arguments often cite lack of time and lack of money - which I don't go with. You can buy cheap cuts of meat, decent fresh vegetables, fruit, etc., to make quick, delicious and nutritious meals. Pasta takes a few minutes. While it's cooking, roast some vegetables and then put it all together in a warm bowl. Delicious.

There's nothing wrong with horsemeat, by the way - it's the whole of the processing of these meals - additives, colourings, flavourings, salting - which is a massive turn-off for me.