Stir together flour, 3/4 cup sugar, 1/2 teaspoon cinnamon, and 1/4 teaspoon salt in bowl of a heavy-duty electric stand mixer.
Add yeast and next 3 ingredients; beat at low speed with mixer, using dough hook attachment, 1 minute. Increase speed to medium, and beat 1 more minute. Cover dough with wax paper, and let stand 30 minutes.
Stir together pineapple, 2 tablespoons sugar, 1 teaspoon cinnamon, and remaining 1/4 teaspoon salt in a saucepan over medium heat; simmer 1 minute.
Process pineapple mixture in a blender or food processor until smooth, stopping to scrape down sides. Return to pan, reserving 2 tablespoons.
Stir together reserved 2 tablespoons pineapple mixture and cornstarch in a small bowl.
Whisk cornstarch mixture into pineapple mixture in pan, and cook, whisking often, 2 minutes or until smooth and thickened.
Remove pan from heat, and cool.
Turn dough out onto a lightly floured surface; divide into 12 equal portions.
Roll each portion to a length of 10 inches, forming a 6-inch base and 2-inch top (shape resembles a triangle with a flat top).
Spread 1 1/2 tablespoons pineapple mixture on 1 side of each portion, leaving a border around edges.
Roll up each dough portion, starting at 6-inch end, and place on 2 lightly greased baking sheets (6 portions per baking sheet).
Combine remaining 2 tablespoons sugar and remaining 1/4 teaspoon cinnamon; sprinkle evenly over dough.
Cover and let stand in a warm place (85), free from drafts, 15 minutes (dough will not double in bulk).
Bake at 375 for 15 to 18 minutes. Cool on baking sheets on wire racks.
Empanadas: Stir together 1 (15-ounce) can unsweetened pumpkin, 2 tablespoons sugar, 1 teaspoon ground cinnamon, and 1/4 teaspoon salt. Prepare dough as directed. After dough stands 30 minutes, divide into 12 equal portions, and shape into balls.
Roll or flatten balls into 6-inch circles. Spoon 1 1/2 tablespoons pumpkin mixture onto half of each pastry circle. Moisten edges with water; fold dough over pumpkin mixture, pressing edges to seal. Crimp edges of dough with a fork.
Place on lightly greased baking sheets. Cover and let stand in a warm place (85), free from drafts, 15 minutes.
Bake at 375 for 15 minutes or until golden brown. Cool on baking sheets on wire racks. Makes 1 dozen. Prep: 50 min., Stand: 45 min.,
Bake: 18 min.
Cuernitos: Prepare dough as directed. After dough stands 30 minutes, turn out onto a lightly floured surface, and divide into 12 equal portions.
Roll each portion to a length of 10 inches, forming a 6-inch base and 2-inch top.
Roll up each portion, starting at 6-inch end. Gently shape each portion into a crescent, and place on lightly greased baking sheets.
Combine 2 tablespoons sugar and 1/4 teaspoon cinnamon; sprinkle evenly over dough. Cover and let stand in a warm place (85), free from drafts, 15 minutes.
Bake at 375 for 15 ro 18 minutes. Cool on baking sheets on wire racks. Makes 1 dozen. Prep: 50 min., Stand: 45 min.,