Caramel Banana Roll Cake

💥Ingredients💥
• 4 large eggs, separated 🥚
• 3/4 cup granulated sugar 🍚
• 1 cup all-purpose flour 🌾
• 1 teaspoon baking powder 🍰
• 1/4 teaspoon salt 🧂
• 2 ripe bananas, mashed 🍌🍌
• 1 teaspoon vanilla extract 🌿
Filling: