Banana Pecan Coffee Cake Recipe

Name: Banana Pecan Coffee Cake Recipe
Ingredients: For the Streusel; 8 ounces chopped pecans; 1/3 cup dark brown sugar; 1/4 cup sugar; 1 teaspoon cinnamon; 1 1/3 cups all-purpose flour; 10 tablespoons unsalted butter, melted; For the Cake; 1 1/4 cups all-purpose flour; 1 teaspoon baking powder; 1/4 teaspoon baking soda; 1/2 teaspoon salt; 6 tablespoons unsalted butter; 3/4 cup sugar; 2 eggs plus 1 egg yolk; 1 teaspoon vanilla extract; 7 ounces Greek yogurt; 2 cups diced banana, from about 2 medium bananas