Mexican Grilled Shrimp Caesar Salad

Name: Mexican Grilled Shrimp Caesar Salad
Ingredients: 1/4 cup pepitas (hulled pumpkin seeds); 1 1/2 pounds peeled and deveined large shrimp; 1/4 to 1/2 teaspoon cayenne pepper; 5 tablespoons olive oil; kosher salt and black pepper; 1 tablespoon red wine vinegar; 1 teaspoon Worcestershire sauce; 1/4 jalapeño pepper, finely chopped; 1 clove garlic, finely chopped; 1 small head romaine lettuce, leaves torn (6 cups); 1/2 small jicama or 1 Granny Smith apple, peeled and cut into matchsticks; 1/2 small red onion, thinly sliced; 1/2 cup crumbled Cotija, queso fresco, or Feta (2 ounces)