Heat the grill to medium-high, brush it with oil, grill the chicken until just cooked, about 3-5 minutes per side, baste it with the strawberry BBQ sauce and let it cook for another minute.Lightly grill the buns and assemble the sandwiches with bottom bun, lettuce, tomato, bacon, avocado, chicken, strawberry BBQ sauce, goat cheese and top bun.