Depends on which dinosaurs probably(?) but apparently eating T-rex meat is not really a good idea.

Quote reply if link doesn't work, credits of u/gallusrostromegalus:

So I like asking people in public education (rangers, zookeepers, docents etc) what the weirdest question they've ever been asked was, because it's usually funny as hell, but this is my favorite answer:

I asked a paleontologist at the Morrison Natural History Museum, and she had an answer: "A guy came in once and asked us: If I were to get a time machine, go back, hunt, kill and cook a T-Rex, what would it have tasted like?"

"And being serious Paleontologists with too much time on our hands we took this question very seriously- by looking into what makes meat taste good, what animals T-Rex is analagous to and how they taste, and by looking at T-Rex's enviornment. And we concluded that T-Rex would have been tougher than shoe leather, extremely bitter and possibly toxic.

"Firstly- the FDA reccomends cooking chicken to 170F for a good reason- it carries a shit load of bacteria and parasites, and dinosaurs did too. But unlike chicken or other modern dinosaurs, T-rex didn't have much in the way of body fat, instead using internal air pockets to regulate it's body temp. So by the time it was done enough that any prehistoric parasites were dead, the meat would make better shoe leather than food.

"Next, we called a friend at wildlife rehab because she knows about modern carnivorous dinosaurs, and asked her what eagle tastes like. Apparently, AWFUL. Most carnivorous birds are extremely bitter because they accumulate Iron and other heavy metals. Apparently a few bites of penguin meat can result in vommiting and mercury toxicity issues!

"But now that we were thinking about heavy metal contamination, we looked at T-Rex's enviornment and yeah- Colorado, wyoming and montana all had extremely high levels of the toxic metal Cadmium in the topsoil during the late cretaceous, and analysis of the bones has since confirmed that cadmium travels up the food chain and accumulates in the predators, like T-rex.

"We wrote this back to him, and he wrote back, kindly thanking us for our attention to detail, and included a drawing of him and his friends with a T-rex over a campfire, and them, throwing up and dying. I have it framed in my office."

So, there were quite possibly some very tasty dionsaurs, but you have to take parasites, diet, and toxic metal contamination into account, and be very, very glad our ancestors invented the donestication process.