Step 1

Process cilantro, garlic, white pepper, and salt in a food processor until finely chopped, about 15 seconds, stopping to scrape down sides of bowl as needed. Add shrimp and pork fat. Process until mixture forms a smooth paste, about 2 minutes, stopping occasionally to scrape down sides of bowl as needed. Transfer mixture to a medium bowl. Stir in seasoning sauce and sugar.

Step 2

Spread 3/4 ounce (about 1 heaping tablespoon) shrimp mixture on each bread triangle in an even layer. Pour oil to a depth of 1/8 inch in a large skillet; heat over medium-high until shimmering. Working with 8 to 10 bread triangles at a time, fry bread, shrimp side down, until shrimp side is golden brown and shrimp is cooked through, 3 to 4 minutes. Carefully flip, and cook until bread is golden brown, 15 to 30 seconds. Transfer shrimp toasts to a wire rack set over a baking sheet lined with paper towels. Repeat process with remaining bread triangles and shrimp mixture.

Step 3

Top shrimp toasts with mayonnaise and sriracha. Garnish with cilantro leaves and pea shoots. Serve hot.