Preheat the oven or toaster oven to 375°F (190°C). Lightly brush both sides of the sourdough bread with olive oil, then season with salt and pepper. Place the bread on a baking sheet and bake for 14 to 16 minutes, flipping it halfway, until golden and crispy. Remove from the oven and set aside.
While the bread is toasting, pat the shrimp dry between paper towels.
In a medium skillet, melt the butter over medium-low heat. Once bubbling, add the garlic and sauté for about 30 seconds, stirring constantly, until fragrant. Do not let it brown.
Add the shrimp in a single layer and cook for 1 to 2 minutes until the underside turns pink and opaque. Flip and cook for another 1 to 2 minutes until almost fully cooked.
Pour in the sherry. The alcohol will smell strong at first, but continue cooking for 1 to 2 minutes until the scent mellows and becomes slightly sweet.
Stir in the whipping cream and mix well. Cook for another 1 to 2 minutes, stirring occasionally, until the sauce thickens slightly. The sauce is ready when a spatula leaves a visible trail through it before closing back in. Season with salt and pepper to taste.
Place a slice of toasted sourdough on each plate, then top each slice with 5 shrimp. Divide the sauce evenly over the shrimp, garnish with chives if using, and serve immediately.
Notes
If using frozen shrimp, thaw them overnight in the fridge or quickly in a sealed bag submerged in cold water for about 20 minutes. Pat them completely dry before cooking.
If your bread is very fresh, it may take longer to crisp up in the oven.
Use a skillet that isn’t too crowded when cooking the shrimp. If they’re packed too closely, they’ll steam instead of searing.
The sauce will thicken more as it cools, so take it off the heat while still slightly loose to keep the right consistency when serving.
Storage
This dish is best eaten fresh, but leftovers can be stored in an airtight container in the fridge for up to two days.
Reheat gently over low heat, stirring frequently, and add a splash of cream if the sauce has thickened too much. Avoid microwaving, as it can overcook the shrimp and make them rubbery.