Step 1 of 7
Preheat the oven to 230°C.
Step 2 of 7
Place asparagus on a parchment-lined baking tray. Drizzle with oil, and season with salt and pepper. Toss to coat.
Step 3 of 7
Separate asparagus into bundles of either 2 spears or just 1 large spear on its own.
Step 4 of 7
Carefully wrap a piece of bacon around each bundle and place on a baking sheet.
Step 5 of 7
Roast until asparagus begins to wilt and bacon is brown, 20 to 30 minutes - depending on the thickness of bacon and how crisp you like your bacon.
Step 6 of 7
Meanwhile, mix together mayonnaise, sriracha, lime juice and cilantro in a small bowl. Sauce can be refrigerated in an airtight container for up to 1 week.
Step 7 of 7
Transfer bundles to a platter; serve with dipping sauce.