Sautéed Onion-Mushroom and Spicy-Sweet Jalapeño Flatbread

With its sautéed mushrooms and onions topped with Monterey Jack cheese, this flatbread looks familiar. What sets it apart and makes it addictive is the subtly spicy yet sweet note from a fresh jalapeño reduced in agave nectar, vinegar, and lime juice, then minced and mixed in the topping to perfume each bite. I like it fairly spicy, but remove the seeds and membranes for less heat. Enjoy it for hors d’oeuvres, lunch, or whenever you want a tasty nibble.