1. Gather all the necessary ingredients, ensuring they are at room temperature for better mixing.
2. Prepare the egg mixture by whisking together 3 large eggs, 1 cup of milk, 1 tablespoon of sugar, 1 teaspoon of vanilla extract, 1/2 teaspoon of cinnamon, a pinch of nutmeg, and salt in a mixing bowl until smooth.
3. Preheat a non-stick skillet or griddle over medium heat and melt a pat of butter to evenly coat the surface.
4. Dip each slice of thick bread (like brioche, challah, or French bread) into the egg mixture, ensuring both sides are fully coated but not overly soaked.
5. Place the dipped bread slices onto the heated skillet and cook each side for about 2 minutes until golden brown, adjusting the heat as needed to prevent burning.
6. Prepare the blueberry compote by cooking 1 cup of blueberries with 2 tablespoons of water and 1 teaspoon of sugar in a small saucepan over low heat until the berries burst and form a sauce-like consistency.
7. Caramelize the banana slices by sprinkling them with sugar and cooking them in the same skillet until golden and caramelized on both sides.
8. Assemble the French toast by layering the cooked slices on a plate, topping them with caramelized bananas and a generous drizzle of blueberry compote.
9. Optional: Add a sprinkle of powdered sugar or a dollop of whipped cream for garnish.
10. Serve immediately and enjoy your freshly made Banana Berry French Toast.