Prepare the Garlic Butter: In a small bowl, combine the softened butter, minced garlic, Parmesan cheese, and garlic salt. Mix until well combined.
Make the Texas Toast: Smear the garlic butter generously on both sides of each slice of thick-cut bread, covering edge to edge. Bake in a preheated oven at 350°F (175°C) for 10 minutes, or until golden brown.
Prepare the Tomatillo Pico: In a medium bowl, combine the diced tomatillos, diced Roma tomato, lime juice, cayenne pepper, and salt. Toss gently and set aside.
Marinate the Shrimp: In a bowl, whisk together the eggs and hot sauce. Add the peeled and deveined shrimp and toss to coat. Let marinate for 15 minutes.
Season the Shrimp: In a separate bowl, toss the marinated shrimp with seasoned salt, garlic powder, and black pepper.
Prepare the Breading: In a shallow dish, combine the cornmeal, flour, cayenne pepper, garlic powder, salt, paprika, and black pepper.
Bread the Shrimp: Toss the seasoned shrimp in the cornmeal mixture, ensuring each piece is fully coated. Shake off any excess breading.
Fry the Shrimp: Preheat frying oil to 350°F (175°C) in a deep pot or fryer. Carefully add the breaded shrimp and fry for 4-6 minutes, or until golden brown and cooked through. Remove the shrimp from the oil and immediately sprinkle with a pinch of salt.
Assemble the Shrimp Toast: Place a piece of golden Texas toast on a serving plate. Top with a spoonful of tomatillo pico, then a generous portion of fried shrimp. Garnish with a lime segment and a drizzle of cilantro tartar sauce. Serve immediately.