1

Preheat oven to 200°F.

2

Heat 1 Tbsp oil in a large skillet over medium-high heat. Add celery, onion and jalapeño; cook, stirring often, until light golden, about 5 minutes. Season with 1/8 tsp salt and pinch pepper; add garlic and cook until fragrant, stirring, 45-60 seconds. Remove from heat; transfer to a bowl to cool.

3

Meanwhile, place 8 oz (about 1 c) shrimp in a food processor fitted with blade attachment; puree until very smooth. Add remaining 1 1/2 lb shrimp; pulse until coarsely chopped.

4

Transfer shrimp to bowl with cooled vegetables; add panko, parsley, lemon zest and Old Bay. Gently combine; season with 1/8 tsp salt and pinch pepper. (To test for seasoning, zap a Tbsp shrimp mixture in the microwave to cook it through first.)

5

Heat 1/2 Tbsp oil with 1 tsp butter in same large nonstick skillet over medium heat until shimmering. Using a ⅔-c measure, shape mixture into 6 burgers. Working with 3 burgers at a time, add burgers to skillet and cover. Cook until bottom is golden brown, about 3 minutes; flip and cook for 3 minutes more. Transfer to a rimmed baking sheet; place in oven to keep warm. Repeat with remaining 1/2 Tbsp oil, 1 tsp butter and 3 burgers. Place on warmed buns with lettuce and tomato. Drizzle with optional hot sauce. Serve immediately.

6

Serving size: 1 burger