Bubble Bread - i am baker

Ingredients

• 2 ¼ teaspoons (1 packet) active dry yeast
• 1 cup (250 g) warm water
• ¼ cup (50 g) granulated sugar
• ½ cup shortening
• 1 large egg, room temperature
• ½ teaspoon kosher salt
• 4 cups (500 g) all-purpose flour
• ½ cup (1 stick / 113 g) salted Challenge Butter, melted
• 4 tablespoons salted Challenge Butter, melted
• 2 teaspoons kosher salt, or less, to taste