Heat oil in large nonstick skillet over medium-high heat. Add pork, serrano chili, chili powder, cumin, cinnamon and allspice to skillet and stir 3 minutes. Add raisins and lime juice; boil until almost all liquid evaporates, about 1 minute. Remove from heat. Mix in almonds and sour cream. Season with salt and pepper. Cool.
Butter 2 large baking sheets. Mix flour, Masa Harina, baking powder and salt in large bowl. Stir in melted butter. Whisk water and 1 egg in small bowl to blend. Add to flour mixture; knead in bowl until smooth pliable dough forms, about 2 minutes. Working with half of dough at a time, roll out on floured surface to 1/8-inch thickness. Using 3 3/4-inch-diameter biscuit cutter, cut out rounds. Reroll scraps and cut out additional rounds for a total of 12 rounds per dough half.
Whisk remaining egg in small bowl to blend. Place 1 tablespoon filling in center of each dough round. Lightly brush edges with egg. Fold dough over, pressing edges with fork to seal. Place on prepared baking sheets. (Can be made 1 day ahead. Cover with plastic wrap; chill.)
Preheat oven to 375°F Brush empanadas with beaten egg. Bake until light golden brown, about 25 minutes. Serve with Chipotle Salsa and sour cream.
For Chipotle Salsa.
Combine all ingredients in medium bowl. Season with salt and pepper.
MAKES ABOUT 3 CUPS.