Tangy Lime Shirmp

1lb medium shrimp, patted dry
4 tbsp of butter
1/4 cup chopped shallots
1/4 cup lime juce, plus 1 tsp grated zest
1/4 tsp crushed red pepper
1/3 cup chopped cilantro

Season Shrimp.  Heat large skillet over med-high; add 1/2 tsp butter and shrimp.  Cook shrimp through, 1 to 2 mins; transfer to plate. Over med-low heat, melt 1 tbsp of butter, add shallots, lime juice and crushed red pepper; cook 2 mins.  Add remaining butter, zest, shrimp and cilantro; toss.