Prepare a stove-top griddle or an outdoor grill.
In a large bowl, combine all of the vegetables and set aside.
Grill the sausage until golden brown, about 5 to 7 minutes. Transfer to a cutting board and cut into 1/4-inch pieces. Grill the bread until golden, about 2 minutes.
Toss the sausage into the salad bowl, drizzle the Buttermilk Dressing over, and toss to incorporate. Place a slice of grilled bread on each of 4 dinner plates and arrange the salad over each piece.