Make the sausage: Toast the coriander, fennel and caraway seeds in a small skillet over high heat, stirring, until fragrant, 3 to 4 minutes. Cool completely, then grind with a mortar and pestle or a spice grinder. Add the garlic, sage, 1 teaspoon salt, 1 teaspoon black pepper and the red pepper flakes; grind to mix. Combine the spices with the ground pork in a bowl. Add the maple syrup and mix. Cover and refrigerate 30 minutes.
Meanwhile, make the dough: Combine the flour, brown sugar, baking powder, Italian seasoning, mustard powder, baking soda, cayenne and sea salt in a food processor; pulse to combine. Add the butter and pulse 5 to 6 times (for 4 to 5 seconds each time), until the mixture resembles cornmeal. Add the mozzarella and pulse 3 to 4 times, until well combined. Add the buttermilk and process until a ball forms. Wrap in plastic wrap and refrigerate at least 30 minutes.
Form the sausage mixture into 16 mini sausages, about 4 inches long (use about 2 tablespoons sausage for each). Heat a large nonstick skillet over medium-high heat. Cook the sausages in 2 batches until cooked through, 4 to 5 minutes per side. Cool on paper towels.
Turn the dough out onto a floured surface. Sprinkle with flour, then gently pat out and roll into a 12-by-16-inch rectangle. Trim the edges to make them even. Cut the rectangle in half crosswise, then cut each half into four 3-by-8-inch strips. Cut each strip in half diagonally to form 16 long triangles. Transfer to a baking sheet, cover loosely with plastic wrap and refrigerate 15 minutes. Meanwhile, preheat the oven to 375 degrees F.
Place 1 sausage on the wide end of a dough triangle and roll up. Repeat with the remaining dough and sausages. Arrange the pigs in blankets 2 inches apart on 2 parchment-lined baking sheets. Brush the tops with the beaten egg and bake until golden, about 15 minutes.
Meanwhile, make the chipotle-agave mustard: Combine the agave, both mustards, the adobo sauce and a pinch of black pepper in a bowl. Serve the pigs in blankets with the mustard.
Photograph by Con Poulos
Recipe courtesy Guy Fieri for Food Network Magazine