Preheat the Grill
Begin by preheating your grill to 450°F. Set up a two-zone cooking area by arranging one side with direct flame heat and the other side without flames.
Grill the Chicken
Season the chicken breasts evenly with the Hey Grill Hey Sweet BBQ Rub. Place them on the indirect side of the grill, cover, and cook for 5-10 minutes per side until the internal temperature reaches 145°F.
Baste and Finish Grilling the Chicken
Once the chicken is cooked on the indirect heat, brush it with 1 cup of BBQ sauce (or your preferred BBQ sauce) on all sides. Move the chicken to the direct heat side of the grill, cooking for 2-3 minutes per side until the internal temperature hits 160°F.
Grill the Bacon
As the chicken grills, arrange the peppered bacon slices on the indirect heat side of the grill. Brush with maple syrup and cook for 2-3 minutes per side, then set aside on a plate.
Add the Cheese and Finalize the Chicken
Top each chicken breast with a slice of medium cheddar cheese and cook for an additional 2-3 minutes or until the chicken reaches an internal temperature of 165°F.
Toast the Buns
Lightly toast the sandwich buns on direct heat for 1-2 minutes until golden and crisp, then remove them and set aside for assembly.
Prepare the Onion Rings
Heat vegetable oil in a large Dutch oven over medium-high heat to about 350°F. While the oil heats, prepare the onion rings. In a zip-top bag, combine flour, seasoned salt, and smoked paprika. Pour buttermilk into a separate zip-top bag. Working in batches, place the onion rings into the flour mixture to coat, then dip them in buttermilk, and return them to the flour mixture for another coat.
Fry the Onion Rings
Fry the prepared onion rings in the hot oil for 3-4 minutes or until golden brown and crispy. Remove the fried onion rings and let them drain on a paper towel, lightly sprinkling with salt. Set them aside for sandwich assembly.
Assemble the Sandwiches
To assemble, place a leaf of butter lettuce on the bottom of each toasted bun. Add a grilled chicken breast, then layer with two slices of maple-peppered bacon, 2-3 onion rings, a few pickled jalapeños, and a generous drizzle of BBQ sauce. Top with the other half of the bun and serve immediately.