01 - Preheat oven to 400°F. Line a baking sheet with aluminum foil and lightly grease the surface.
02 - Slice each chicken breast in half horizontally, then cut into 8 equal-sized portions for even cooking.
03 - In a mixing bowl, whisk together the maple syrup, Dijon mustard, soy sauce, olive oil, salt, and pepper until well combined.
04 - Add the chicken pieces to the marinade and toss to coat evenly. Let rest for 10 to 15 minutes at room temperature.
05 - Arrange the bacon slices on the prepared baking sheet and bake for 12 to 15 minutes until golden and crisp. Transfer to paper towels to drain.
06 - Heat a grill pan or skillet over medium-high heat. Sear the marinated chicken pieces for 3 to 4 minutes per side until fully cooked through with a caramelized exterior.
07 - Brush the cut sides of each bun with melted butter and toast on a hot skillet until lightly golden.
08 - Layer arugula, a chicken piece, a strip of bacon, a slice of cheese, and red onion on the bottom half of each bun. Cap with the top bun.
09 - Secure each slider with a cocktail pick and serve immediately while warm.