Fall Rustic Flatbread Pizza

Ingredients

• 1 store-bought thin pizza crust (I use whole-wheat pizza crust)
• 2 leeks, sliced into rings, white and light green parts only
• 4 pieces of thinly sliced Prosciutto
• 1 ½ cups Gruyere cheese
• 2 Tbls pesto
• 1 tsp freshly chopped thyme
• 2 cups baby arugula, tossed with olive oil, salt and pepper