Combine flour and salt in a large bowl. Cut in shortening until mixture resembles coarse crumbs. Stir in water until dough comes together. Shape into a ball, wrap in plastic, and refrigerate for 30 minutes.

Preheat the oven to 350°F (175°C). Line a baking sheet with parchment paper.

Mix meat, potatoes, onion, carrot, rutabaga, salt, and pepper in a bowl until well combined.

Remove dough from the refrigerator and divide into six pieces. Shape pieces into balls, then roll into 6-inch diameter rounds on a lightly floured surface. Spread about 1 cup filling over half of each round and dot with 1 tablespoon margarine. Fold uncovered pastry up and over filling; crimp edges to seal. Prick with a fork and place onto the prepared baking sheet.