01 - In a bowl, toss shrimp with olive oil, smoked paprika, garlic, lemon juice, salt, and pepper until evenly coated.
02 - Heat a skillet over medium-high heat. Cook shrimp 2-3 minutes per side until pink and cooked through. Remove from heat and set aside.
03 - In a small bowl, whisk together mayonnaise and Dijon mustard until smooth. Set aside for assembly.
04 - Slice sandwich rolls in half. Lightly butter cut sides and toast in a skillet or toaster until golden brown.
05 - Spread mayo-mustard sauce on both sides of toasted rolls. Layer lettuce, tomato, onion, and avocado on bottom halves. Top with sautéed shrimp and cover with top roll.
06 - Serve immediately while shrimp is warm and bread remains crisp for optimal texture and flavor.