Step 1Heat the oven to 400 degrees.
Step 2Melt the butter over medium-low heat in a large ovenproof skillet. Add the garlic and cook until tender but not browned, 2 minutes. Stir in the red pepper flakes, pepper and salt. Add the shrimp and lemon slices. Toss to coat thoroughly.
Step 3Place the skillet in the oven and bake, stirring occasionally, until the shrimp is pink, 15 minutes.