Preheat the oven to 375 degrees F.
For the pancakes: Mix the buttermilk, milk, melted butter and eggs in a large mixing bowl. In a separate bowl, mix the flour, white sugar, baking powder and baking soda. Slowly whisk the dry mix into the wet mix with a whisk until incorporated.
In a buttered large skillet, ladle 8 ounces of batter at a time. Brown each side, flipping when browned and beginning to bubble. Remove the pancake and continue to cook until all the batter is done. Square off the edges of each pancake and set aside.
For the bacon and sausage: Place a grill rack over a baking tray. Line the rack with the bacon strips and bake until crispy, about 15 minutes. Reserve the rendered grease in a large saucepot.
Line a baking tray with the sausage links and bake until cooked through, about 15 minutes. Chop the sausage finely, add the chopped sage and mix.
For the eggs: Whisk the eggs until smooth. Cook in a buttered large skillet over medium heat until cooked through. Place in a blender and add enough cream until blended smoothly. Remove and let cool.
For the maple bechamel: Add the butter and flour to the reserved bacon fat in the large saucepot and make a roux. Add the cream and maple syrup and cook over low heat, stirring until thickened, about 30 minutes. The sauce should have the consistency of gravy.
To assemble: Butter a casserole dish, and line the bottom with a single layer of pancakes. Lightly spread the bechamel over the pancakes until covered. Place the chopped sausage on top of the pancakes, spreading evenly until covered. Spoon half the egg mixture over the sausage and spread until evenly dispersed. Add another layer of the bechamel, and then add a layer of shredded cheese. Add another layer of pancakes, then bechamel, then bacon strips, bechamel again, then eggs and finish with a liberal covering of cheese. Bake until the cheese has melted on top and begun to get crispy, about 10 minutes. Remove from the oven and let cool. Then cut portions of lasagna.
Place a portion of lasagna on the plate and spoon the syrup over the top to taste.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.