Heat olive oil in a saucepan; add wine and lemon juice when olive oil starts to boil. Place shrimp in the pan and cook on medium heat until shrimp curls. Remove shrimp but leave wine mixture in the pan.
the same saucepan, add onion, minced garlic, and garlic salt; saute until the onions are transparent. Add flour and water paste; stir and cook until sauce is thick. Pour cream in the sauce, stir, then add the cheeses one at a time, whisking constantly after each addition.† The sauce should be a medium thick consistency and smooth; if the sauce is too thick, add a little water and whisk. Remove from heat.