01 - Preheat oven to 400°F (200°C).
02 - Slice each chicken breast horizontally to create 6 even, small fillets.
03 - In a mixing bowl, whisk together the maple syrup, Dijon mustard, soy sauce, olive oil, smoked paprika, black pepper, and salt until well combined.
04 - Add the chicken fillets to the marinade, turning to coat evenly. Let rest for 10 minutes at room temperature.
05 - In a large skillet over medium heat, cook the bacon slices until golden and crispy, about 4–5 minutes per side. Transfer to paper towels to drain.
06 - Remove chicken from the marinade, reserving the remaining liquid. In the same skillet or on a grill pan, sear the fillets over medium-high heat for 3–4 minutes per side until fully cooked through. Set aside.
07 - Pour the reserved marinade into the skillet and simmer over medium heat for 2–3 minutes until slightly thickened. Brush the reduced glaze generously over each cooked chicken fillet.
08 - If using cheddar, place a slice on each glazed chicken fillet and broil for 1 minute until melted and bubbling.
09 - Lightly brush the cut sides of each slider bun with butter. Toast in a skillet over medium heat until golden brown.
10 - Spread a thin layer of mayonnaise on each bottom bun. Layer with arugula, a glazed chicken fillet, a slice of bacon, a few rings of red onion, and the top bun. Serve immediately.