Roasted Veggie Panini with Creamy Chipotle-Lime Dressing

Ingredients:
4 high-quality ciabatta or focaccia rolls or 8 slices high-quality sandwich bread (like sourdough)
Creamy Chipotle-Lime Dressing (recipe below)
8 1-ounce slices Provolone or pepperjack cheese (or half Provolone and half pepperjack)
1/2 cup guacamole
2 portabello mushrooms, cut into 1/2″ slices
1 small red onion, sliced
1/2 pound fresh asparagus, tough ends snapped off
1/2 cup (approximately) roasted red peppers
Creamy Chipotle-Lime Dressing
1 cup mayonnaise
1/2 cup buttermilk
1 1-ounce package Hidden Valley Ranch dressing mix
3-4 cloves garlic
Juice of 1 lime
1/4 cup adobo sauce (from a can of chipotle chilies)
1/2 cup roughly chopped cilantro (about 1 handful)
Instructions:
To prepare the dressing, place all the ingredients in a blender and blend until combined. Refrigerate for at least 30 minutes before serving.
Preheat oven to 450. Line a baking sheet with aluminum foil. Place washed and snapped asparagus, sliced portabellos, and sliced onion on the baking sheet. Drizzle with 2-3 tablespoons olive oil and sprinkle with kosher salt and freshly ground black pepper. Toss to evenly distribute the the oil and salt and pepper (you may need a little more on the mushrooms because they tend to absorb it). Roast for 15 minutes or until veggies are tender.
While the veggies are roasting, spread both sides of each piece of bread with the Creamy Lime-Chipotle Dressing. Place a slice of cheese on the bottom. Add 1/4 of the roasted red peppers.
Spread the top with guacamole and then place another slice of cheese on top of the guacamole.
When the veggies are done roasting, divide them among the sandwiches (on the bottom half). Top each sandwich and cook in a panini press (or on a skillet with a heated pan pressed on top of the sandwich). Allow to stand 2-3 minutes before cutting in half and serving. Makes 4 large sandwiches.
Picture and recipe courtesy of ourbestbites.com.  Served this at Rachel's Wedding - amazing.