Preheat the oven to 425°F. Spritz a roasting pan with cooking spray. Set up all of your ingredients before you begin to wrap the bundles.
Brush the asparagus spears lightly with olive oil or spritz with cooking spray. Season with garlic salt [lightly] and black pepper. [Go light with the salt. The Parmesan-Romano cheese will add extra saltiness to the bundles]
Bundle the asparagus in three's. Use one slice of bacon per bundle.
Start wrapping the bacon around the stems tightly beginning at the bottom. If you choose to use baby asparagus, a half slice of bacon should be enough.
Roll in the grated Parmesan-Romano cheese and lay seam side down on the baking pan. Make sure the bundles aren't touching.
Repeat until all of the asparagus and bacon slices have been used.
Place into the oven and bake for 23-25 minutes depending on the thickness of the asparagus. Turn halfway through cooking.
Increase the oven temperature to broil and cook for an additional 3-5 minutes to fully crisp the bacon.
Sprinkle with additional Parmesan-Romano cheese to garnish.
Serve warm with the dipping sauce if desired.