Combine eggs, egg yolks, milk, cream, salt, vanilla, nutmeg and 2 tablespoons of the sugar. Whisk well until evenly combined.
Place the bread in a shallow dish that will fit the slices snugly. Pour the egg mixture into the dish to soak in the refrigerator for at least 8 hours. Four hours in, flip the slices carefully to ensure even soaking.
When ready to cook, place a large cast-iron skillet into a 425 degree oven.
Remove the slices from the dish, letting any excess liquid drip off, and place on a plate. Sprinkle the bread evenly with the remaining ½ cup sugar.
Carefully remove the heated skillet from the oven and add 4 tablespoons Land O Lakes® Butter with Olive Oil & Sea Salt to the pan. Spread it around and add the sugar-coated bread, spacing evenly. Reduce heat to 400 degrees and transfer the skillet back into the oven. Cook until the bottoms are evenly toasted and golden brown, 14 to 18 minutes.
Carefully remove the skillet from the oven with an oven mitt, flip the bread and add the remaining 4 tablespoons Land O Lakes® Butter with Olive Oil & Sea Salt in slivers around the slices. Cook until the bottoms are nicely browned, 7 to 8 minutes. Serve immediately with the syrup and berry compote.
To make the berry compote: heat blueberries in maple syrup until warm and nearly bursting. Remove from the heat and fold in raspberries.