Bring a large pot of salted water to boil. Using tongs or gloves, transfer nettle leaves to water. Boil for 1-2 minutes until wilted. Drain and rinse with cold water immediately. Let cool.
Combine drained nettles, olive oil, pine nuts, garlic, and Parmesan cheese in a food processor. Pulse until smooth. Add salt and pepper to taste.
Bring another large pot of salted water to boil. Cook pasta until al dente. When pasta is done cooking, drain and mix with pesto (you may have some extra pesto left over).
In a skillet, brown bacon until slightly crispy. Sprinkle on top of pasta and serve immediately.
Recipe by Things I Made Today at https://www.thingsimadetoday.com/2014/05/11/nettle-pesto-pasta-bacon/