I'm like Caneyscuds recipe but I do them differently though I do believe in the five major food groups

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Thaw 1 - 2 pounds of frozen shrimp, unless you live within 50 miles of where they're caught - then use fresh. I thaw in the fridge if I have the time (rarely) or in cold, lightly salted water. Try to get about 15-21/pound. Never rely on "jumbo", "super extra large", etc.
Add 1/2 to 3/4 of a stick of unsalted butter and about 1/4 cup of plain old olive oil to a 12 inch cast iron pan. Fire it up on low to slowly melt the butter. Chop, dice or slice (I like sliced) 4-5 good sized garlic cloves to the pan and let them sweat until tender. Make sure the garlic doesn't brown.
Remove the vein in the shrimp. Shell on or shell off is a matter of conjecture. Some say the shell adds flavor (like bone-in meat). It's messier but slows your guests down some

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Preheat your broiler with the shelf about 4 inches away.
Put the shrimp in the pan when you consider the garlic done enough. Toss the shrimp to coat and put the pan under the broiler.
WATCH IT REAL CLOSE. After probably 2-3 minutes, remove the pan, add about a jigger of your favorite white wine, toss the shrimp again and put 'em back under the broiler. Another couple of minutes should do it. Remove the pan to a cooling rack. Squeeze on some fresh lemon juice (to taste), toss and let 'em set a few minutes. Serve on a platter with a parsley and lemon slice garnish and eat!
Notes:
- Don't overcook the shrimp or they'll end up like rubber.
- If it looks like the garlic is really browning up at the first toss, get it out of there. Overcooked garlic can really get bitter.
- I never use cheese of any kind on Italian-style shellfish. You really want the taste of the shrimp and garlic.
- Angel hair pasta goes good with this along with a nice, light salad.
- I've done these totally both in the pan and under the broiler. They simply seem to taste better when done with the dry heat of the broiler with shells on.
Enjoy