I loved the garlic shrimp from the shrimp trucks in Kahuku. So, I set about trying to recreate it. It's still not quite right, but here's my best effort:
1 lb large shrimp, raw, shell-on 26-30
2 tbs salt
2 tbs sugar
2 tbs butter
2 tbs extra virgin olive oil
2-3 cloves garlic (depending on how 'garlicky you like it')
Place shrimp, salt, and sugar in a large bowl and fill with enough water to cover the shrimp completely. Let brine for 20-30 minutes. Rinse lightly and drain.
Add butter and extra virgin olive oil to a large saute pan and melt at medium-high heat. As the butter begins to bubble, press the garlic directly into the saute pan and swirl until fragrant - about 20 seconds. Add shrimp immediately in a single layer allowing it to cook on one side until pink - 1-2 minutes. Turn and cook until uncooked side pink as well, another 1-2 minutes. Remove shrimp from the pan and reduce remaining juices to desired consistency - add shrimp and serve over short-grain rice.