Preheat oven to 375°F. Microwave or bake potatoes until fork-tender. Let cool slightly and remove skins.
Rice potatoes into a medium mixing bowl. Add a generous sprinkle of sea salt (1 tbsp), 2 tbsp grated parmesan, and 1 whole egg.
Mix until the potatoes look like diced hard boiled eggs. Then, sprinkle over 1/2 cup 00 flour and work into a dough, just until combined. Cover and set aside.
Spread pumpkin puree onto a large parchment or silicon-lined baking sheet in a thin layer. Bake for 10-15 minutes until deepened in color.
Transfer cooked pumpkin puree to another medium bowl. Season with a generous sprinkle of sea salt (1 tbsp) and top with 2 tbsp grated parmesan.
Add 1 cup AP flour (more if needed) until you have a soft but cohesive dough that doesn’t stick to the bowl. Cover and set aside.
Sprinkle your work surface with a dusting of flour. Cut one dough in half and roll into a thick log, about 16” long. Cut into 16 equal pieces by cutting in half 4 times.
Repeat with your other dough until you have an equal number of gnocchi pieces. Roll every piece into a ball, one at a time, and press 5-6 lines into each ball with a toothpick.
Place pumpkin shaped gnocchi on a parchment-lined baking sheet, dusted lightly with flour.
Heat 2 tbsp butter in a large sauté pan over medium heat until melted and beginning to brown. Place each pumpkin into your sauté pan and cook for 3-4 minutes until golden brown on the bottom.
Carefully pour 2 tbsp water into your hot pan and cover with a lid. Steam for 4-5 minutes until the gnocchi is firm and cooked.
Remove pumpkins from pan and place on a clean, aluminum foil-lined baking sheet.
Heat 6 tbsp unsalted butter in the same sauté pan over medium heat until melted and browned. Add chopped scallions and cook for 1-2 minutes until soft.
Add chopped Swiss chard and cook for another 1-2 minutes until softened. Add lemon juice to taste and season with sea salt.
Plate your Swiss chard mixture first, then place pumpkins on top in alternating colors. Top with a light sprinkle of parmesan cheese.