It is, for example, the rules of the road driving or, for example, spelling, why have we, for example, the word prawn to write a "T" not "D", well, etc, etc and in cooking, there are some rules (and I would say more, very many), who try to abide by, or adhere to, I'm not saying that it's the LAW, but the law is harsh, that's what the law is, as they say. To further develop the idea will not, and point fingers as well, who knows he will understand that. Here is a sample (again,approximately) a set of products that we need, if You are in this moment there are no tomato or parsley, of course, the dish will turn out, and if no cream, shrimp, or pasta then why start...

The dish is prepared very quickly, and most importantly not to overdo it. No pasta, especially shrimp, this is not love. First, put a pot of water on the gas to warm up. We meanwhile cut the garlic and onion finely, sprinkle shrimp with lemon juice and salt. Put in the pan 50-70 grams of butter, and this rule hold, a little heat...

...add garlic with onion, fry until onions are transparent...

..put shrimp, fry for 1-2 minutes, just depends on your shrimp, the quantities of gas, pans, in short, was beginning to blush...

...add chopped tomatoes in half (if not small, and go large, cut into quarters and remove the seeds with juice), another 2-3 minutes...

...pour 70-100 grams of DRY WHITE WINE, allow to evaporate about another 2-3 minutes, taste for salt and pepper.

And now add the cream, about 120-150 grams

try to stir from time to time, to the cream slightly thickened...

...and don't forget about pasta, which is cooked in parallel.

At the very end add chopped parsley,

the finished pasta,

stir a couple of times so that the pasta absorbed all the sauce,

and - you can serve! I GUARANTEE WITHOUT THE SUPPLEMENT WON'T...