1. Preheat your Ooni pizza oven to a medium-high heat.
2. In a saucepan, blanch the asparagus spears – place in gently boiling water for two minutes; remove and place in iced water or under cold running water.
3. Add the olive oil to your Grizzler, then place inside your Ooni to warm up.
4. Lay a slice of Parma ham flat on a chopping board, and lay an asparagus spear on top.
5. Remove the Grizzler from the oven.