In a medium bowl, stir together shrimp, lime juice, salt, garlic powder, paprika, thyme, and peppers. Let stand for 10 to 15 minutes, stirring occasionally.
On a serving platter, place tostada shells. Spread 2 to 3 tablespoons Spicy Guacamole on each tostada shell, and top with pico de gallo. Remove shrimp using a slotted spoon, and divide shrimp among shells. Top with 1 tablespoon pico de gallo and 1 tablespoon cheese. Serve with remaining Spicy Guacamole and remaining pico de gallo. Garnish with cilantro, if desired.
Spicy Guacamole
In a medium bowl, combine all ingredients; mash with a fork to desired consistency. Serve immediately.
Recipe by Louisiana Cookin' at https://louisianacookin.com/cajun-shrimp-guacamole-tostadas/