Begin by spicing the chicken with the spices. Heat your outside grill on medium high heat. Cook the chicken breasts for 12 - 15 minutes. At about 10 minutes of cooking, brush on the BBQ sauce on both sides of the breast and cook for 2 minutes. Add a couple of slices of the chipotle cheese and get a good melt. Remove from grill and let rest for a couple of minutes.
Assemble the sandwich by placing the lettuce on the bottom bun; then the beefsteak tomato and next the chicken breast. Add some more BBQ sauce and top with the bun.
Serve and enjoy!