Preheat the oven to 400°F and line a baking sheet with parchment paper.

On a rimmed tray, mix together the panko, seasoning, and lemon zest. Place the egg in a small bowl nearby. Dip each cauliflower floret into the egg, coat with the panko mixture, then place onto the baking sheet Repeat with remaining cauliflower. Drizzle the coated cauliflower with olive oil and bake for 20 minutes or until crispy and golden brown.

In a small bowl, mix together the mayo, mustard, garlic, paprika, and hot sauce.

Assemble the sandwiches with a generous slather of the remoulade, lettuce, tomato, pickles, and cauliflower. Squeeze lemon over the cauliflower, top with chives, and serve with remaining remoulade sauce on the side.