Preheat oven to 450 degrees.
Prepare two 8x11 baking pans or one larger pan by coating lightly with cooking spray.
Layer sliced apples and sweet potatoes in overlapping rows to completely cover the bottom of the pan(s).
Top with chopped, uncooked bacon and 24 fresh sage leaves (divided evenly among pans if using more than one)
In a small saucepan, heat 2 Tbsp. butter, 1/4 c. brown sugar, and 1/4 c. maple syrup until melted. Drizzle over sweet potatoes, apples, and bacon.
Place tenderloins on top; season with salt and pepper.
In a small saucepan, heat 4 Tbsp. butter, 1/4 c. maple syrup, 1/4 c. dijon mustard, and 2 Tbsp. chopped fresh sage until melted. Drizzle over tenderloins.
Bake, uncovered, 40-45 minutes or until internal temperature is 160 degrees.