Combine beer, flour, and seasonings in a medium sized bowl. Add the string beans and stir to coat.
Add enough canola oil to a large heavy bottomed skillet (I prefer cast iron) to coat it with about 1/8th inch. Heat until it shimmers, but don’t let it smoke.
Add half the string beans to the pan, spreading them out so they don’t stick together while they are cooking. Cook for about 1 minute, and flip the beans using a large spatula. Cook about 1 more minute, or until golden brown. Repeat with the other half of the beans.