Add the chopped bacon to a medium frying pan; cook over medium heat until golden. Transfer to a paper towel lined plate to drain.
Add the gnocchi to the frying pan with the bacon grease; cook over medium heat until the gnocchi gets plump and starts to brown. Remove from pan and set aside.
Add 1 Tablespoon olive oil and chopped onion to the same frying pan; sauté 5 minutes, stirring regularly. Add the minced garlic and sage and cook, stirring, 1 minute.
Add the pumpkin puree, milk, salt and pepper. Bring to a boil, then reduce heat and simmer 5 minutes until the sauce starts to thicken.
Add the bacon and gnocchi to the pan with the sauce.
Garnish with Parmesan cheese and toasted pine nuts as desired.