You can find a range of variants in supermarkets, and in my opinion, broadly, quality is directly reflected in price. At the higher end is a high-end supermarket (which, on a national basis, so excluding the likes of Harrods and F&M, means Waitrose) and you then have a choice of a couple of slices from a joint on the deli counter, to vacuum-packed 'premium' products, then down to more mass-market stuff. At the very bottom end (in my opinion) is "reformed".
So, two issues :-
- chemicals, preservatives, etc
- exactly what ingredients, and type of meat, are involved.
If you buy 'reformed', then it might all be beef, or ham, or whatever the packet says, but what part? High end cut? Or cheap cuts, 'connective' tissue, and so on. If, on the other hand, you buy premium vacuum-packed, then you can see it's slices of a proper joint. And if you buy from the deli section, or better yet and optimally, from a good, local butcher, you can see the joint it's cut from.
I use a really good local butcher (well, two actually, depending on where I am, one being a farm shop). The butcher knows the local farmers, sources (almost all) his meats from local farms, and cooks them himself, on the premises. The farm shop, for beef, IS the local farmer, and they have direct reciprocal, arrangements with identified farms for other non-beef product. So the farm shop supplies beef to the Devon farm he gets pork, ham and dry-smoked bacon from. He deals with several farms for lamb, basically starting in Devon early in the season and working up the country as seasons progress. In all cases, the farm is identified and I even have the phone numbers of the farmer if I needed to contact them.
In an ideal world, I'd agree with Ttaskmaster and 'cook it yourself'. But it isn't usually practical, for many joints. To get it right, it really wants to be quite a large joint to avoid it drying out, and with just two of us most of the time, such a joint would see us having a week or two of roast, cold cuts, sandwiches, curry, etc just to use up the joint, when all we wanted was three or four slices for sandwiches for a couple of days.
Hence ... butcher or deli counter. We can check the joint, decide how much we want not just buy what's in the pack, specify how thick we want to slices, and so on, and while it isn't a cheap way to buy meat, my view is you get excellent product, always fresh (buy small and often, not in large quantity) and because you specify exactly what you need, isn't as expensive as it at first might appear.
So yeah, you pay a premium. But a little, usually zero, waste, and it's worth it for the taste.
And that, by the way, is also my policy for everything from mince, to sausages, to tinned tomatoes. The difference between cheap tinned tomatoes and premium, say Italian, isn't huge in price, but it is in flavour. We keep an eye on the premium ranges in Waitrose and they are periodically on offer, often half price. When they are, I ALWAYS buy at least a couple of four-packs, even if I have several at home. I have plenty of storage space, and nearly always, enough stored to see me from offer to offer, for a top-up.
For sausages, and I
do like a good (stress, GOOD) banger, I always buy from the butcher. And, I can watch him make them, so I know precisely what goes in .... and what doesn't. I even make them myself on occasion. And yeah, I get on well with him.
Failing that, again, high quality, premium sausages are worth the extra. Budget line sausages? Hell, no. I know what goes in 'em.
Anyways, I've gone a bit off-topic, but Marcos .... yes, you can get good quality sliced meats. But other than something like Waitrose, and their higher-end products, you'll have to hunt out the gems, because my local butcher and farm shop aren't much use if you're at the other end if the country.
I used to buy generic stuff because it was easy, convenient and I was busy and pressed for time. But years ago, I took the trouble to research, track down, inspect and sample local farms, butchers, etc, and by God in Heaven, was it ever worth it. It's not necessarily cheap, but not as expensive as you might think.
Some meats, like bacon, are actually cheaper. Not to buy, pound for pound, but once you cooked rashers of (most) supermarket bacons, strained of some fat and poured away a gallon or two of that milky liquid them pump in, you need about four rashers of the crap bacon to give the same cooked quantity as a single rasher of a decent dry-smoked bacon. And there is NO comparison in taste. There's the same relation between the two as a current Aston Martin has with a 1970s Soviet-bloc people's car.
There's no easy answer, Marcos, but to do the legwork. Check out the deli's, check out PREMIUM packaged stuff and please, please, check out local butchers and farm shops (which might take some finding). My farm shop doesn't advertise, and will NOT be found by mistake. In fact, it was hard enough even with their postcode and a SatNav. They're really tucked away. But it was worth it.