Preheat oven to 400 degrees and grease a 9x13 inch baking pan.

Lay strips of bacon on a parchment lined baking sheet and sprinkle with brown sugar and cinnamon and drizzle with maple syrup.

Bake until browned, about 20 minutes, then cool and coarsely chop. Set aside.

Spread cubed bread on baking sheet and toast in oven, until just lightly golden, about 20 minutes. Cool and place in large bowl.

Heat 1 Tbsp butter in a saute pan, add onion and cook until softened, 6-8 minutes. Cool to room temperature.

Whisk eggs, add milk, cream, nutmeg, salt and pepper and whisk again.

Add onion and gruyere and stir to combine.

Pour egg mixture over bread cubes and toss.

Pour bread mixture into prepared pan and sprinkle with bacon.

Wrap tightly in plastic wrap and refrigerate overnight.

The next day, heat oven to 375 degrees and bake strata uncovered for 30-40 minutes or until cooked through and golden brown.