Halve and peel onion. Slice halves into thin strips.
Stem and coarsely chop thyme.
Tear prosciutto into bite-sized pieces.
Cook Onion and Par-Bake Flatbreads
Place 2 tsp. olive oil in a medium non-stick pan over medium heat.
Add onion to hot pan and stir occasionally until browned, 10-13 minutes.
Add water 1 Tbsp. at a time if pan becomes dry.
Remove from burner.
While onion cooks, place flatbreads directly on oven rack and bake in hot oven until lightly browned, 6-8 minutes.
Bake the Flatbreads
Sprinkle cheese, onions, and thyme evenly over flatbreads.
Place directly on oven rack in hot oven with prepared baking sheet on rack below to catch any drips. Bake until golden brown and warmed through, 5-7 minutes.
Finish the Flatbreads
Top flatbreads with prosciutto and drizzle with balsamic glaze.
Top with arugula.
Finish the Dish
Plate dish as pictured on front of card. Bon appétit!