French Toast Panini With Grilled Bananas

Name: French Toast Panini With Grilled Bananas
Ingredients: 6 large eggs; 1 cup whole milk; 1/2 cup heavy cream; 1/4 cup fresh orange juice (from about 1 medium orange); 2 tablespoons vanilla extract; 2 tablespoons cognac (optional); 2 tablespoons granulated sugar; 1/2 teaspoon ground cinnamon; Pinch of freshly grated nutmeg; Salt; 8 slices Texas toast or other thick white bread; 3 large ripe bananas; 2 tablespoons unsalted butter, melted; 3 tablespoons vegetable oil; Confectioners' sugar, for garnish; Pure maple syrup, for garnish