Cook bacon and chop up, if using.

Bring a pot of water with plenty of salt to a boil. Cook pasta according to instructions on the package. Drain pasta and add back to pot.

While the water is boiling, add butter to a nonstick skillet and cook on medium heat until browned, about 5 to 6 minutes. Once the butter is brown, working quickly, turn heat off and add garlic. Cook for 30 seconds. Remove butter and garlic and place in a clean bowl. Set aside.

Add 1 Tablespoon browned butter back to the skillet and turn heat to medium. Add asparagus and cook for 2 minutes. Add heavy cream to pan along with remaining brown butter. Cook for 2 more minutes. Season with salt and pepper. Pour asparagus and butter mixture over pasta in large pot.

Mix pasta together. Serve with green onions and bacon (optional).