**Proof the yeast**
- In a small bowl, combine warm milk with 1 teaspoon sugar. Sprinkle the yeast on top and let it sit for 5–10 minutes, or until foamy.
**Form the dough**
- In a large mixing bowl (or the bowl of a stand mixer), whisk together the flour, remaining sugar, salt, cinnamon, nutmeg, and ginger.
- In a separate bowl, mix pumpkin puree, egg, melted butter, and the foamy yeast mixture.
- Add the wet ingredients to the dry ingredients. Stir or mix on low speed until a soft dough forms.
**Knead the dough**
- Turn the dough onto a lightly floured surface and knead for 5–7 minutes (or use a stand mixer with a dough hook for about 5 minutes).
- If the dough is too sticky, add a little more flour (1 tablespoon at a time). The dough should be soft and slightly tacky but not overly sticky.
**First rise**
- Place the dough in a greased bowl, cover it with plastic wrap or a clean towel, and let it rise in a warm spot for about 1–1 1/2 hours, or until doubled in size.
**Shape and fill**
- Punch down the dough and turn it out onto a lightly floured surface. Roll it into a rectangle roughly 12x20 inches.
- Brush the melted butter (from the filling ingredients) over the rectangle.
- In a small bowl, mix together the sugar, cinnamon, nutmeg, and ginger. Sprinkle this mixture evenly over the dough.
**Cut and stack**
- Cut the dough rectangle into 6 equal strips lengthwise. Stack the strips on top of each other.
- Cut the stacked strips into 6 equal segments. You’ll have stacks of 6 small rectangles.
**Second rise**
- Grease a 9x5-inch loaf pan.
- Carefully stack the dough pieces in the loaf pan, cut sides up, so the layers face each other. Don’t worry if it’s messy; the layers will separate nicely while baking.
- Cover the pan and let the dough rise for about 30–45 minutes, or until slightly puffy.
**Bake**
- Preheat the oven to 350°F (175°C).
- Bake the loaf for 30–35 minutes, or until the top is golden brown and the center registers about 190°F (88°C) on a thermometer. If it’s browning too quickly, loosely cover with foil for the last 10 minutes.
**Cool and glaze (optional)**
- Let the loaf cool in the pan for about 10 minutes, then carefully remove it to a wire rack.
- If glazing, whisk together powdered sugar, milk (or cream), and vanilla until smooth. Drizzle over the warm loaf.