Step 1

Preheat oven to 425°F (220°C).

Step 2

Slice bell pepper and onion into strips. Cut asparagus into 1-2" pieces. Slice mushrooms.

Step 3

Line a baking sheet with parchment paper. Add vegetables and salt if desired. (You could also add dried herbs such as basil, parsley, oregano, etc.)

Step 4

Roast for about 25-30 minutes or to desired tenderness, stirring halfway through.

Step 5

After veggies are roasted, in a skillet over medium heat (or panini press) place a slice of bread. Sprinkle a layer of mozzarella on top.

Step 6

Then add a generous layer of vegetables. Spread pesto on a second slice of bread and place on top, lightly pressing down.

Step 7

Heat about 5-8 minutes on each side or until warmed through and cheese is melted.