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1
In the bowl of a food processor, pulse the bread flour, salt, and instant yeast together to combine. Add pumpkin puree, maple syrup, and melted butter (or oil), and process until the dough comes together in a smooth, pliable ball; the timing can vary depending on the size and power of a given food processor, but expect about 75 seconds from start to finish. To test the dough, tear off a small piece and stretch gently in all directions; when the dough is ready, it can be pulled into a thin, translucent sheet.
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2
Lightly grease a medium bowl, then add the dough. Cover and proof at room temperature until doubled in bulk. This will take about 2 hours at around 72u00b0F; the process will move faster at warmer temperatures, and slower when it is cool. To test the dough, poke it gently with a flour-dusted fingertip; when the dough is ready, it will retain a shallow impression that springs back after a few minutes. If the dough is firm and springs back right away, continue proofing until the dough retains a shallow impression.
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3
Turn the dough onto a work surface with just the barest sprinkling of flour, and knead for a few seconds to deflate; this creates a more uniform crumb in the loaf by eliminating large pockets of air. Pat the dough into a 7-inch square, and form into a tight log, sealing the dough together with your heel. Nestle into a lightly greased loaf pan, seam side down, then cover and proof as before (for dinner rolls, see note on shaping below). The dough will be ready when it's puffy and light, and risen about 2 inches above the rim of the pan. This will take about 2 hours at around 72u00b0F; the process will move faster at warmer temperatures, and slower when it is cool; the dough's readiness can be tested as before. Near the end of this period, adjust oven rack to lower middle position and preheat to 350u00b0F.
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4
When the dough is ready, uncover and bake until well-risen, golden brown, and hollow sounding when thumped; about 45 minutes, or to an internal temperature of approximately 205u00b0F. Immediately turn the loaf out onto a wire rack, and cool completely before slicing. The loaf will keep up to a week at room temperature in a bread box or paper bag.
