Pumpkin Streusel Muffins

Ingredients

• 1 (2.3 pound) sugar pumpkin, cut in half and seeds removed
• 2 tablespoons extra-virgin olive oil
• Pinch salt
• 4 tablespoons cold unsalted butter, cut into cubes
• 7 tablespoons all-purpose flour
• 1/4 cup dark brown sugar, packed
• 1/4 teaspoon ground cardamom
• ¼ teaspoon ground cinnamon
• Pinch of kosher salt
• 1/3 cup raw walnuts
• 2 cups all-purpose flour
• 1 teaspoon baking soda
• 2 teaspoons ground cinnamon
• 1 teaspoon ground cardamom
• 1 teaspoon ground ginger
• ½ teaspoon ground nutmeg
• Pinch ground cloves
• 1 teaspoon kosher salt
• 1 ½ cups pumpkin puree
• 1/2 cup granulated sugar
• ½ cup unsweetened applesauce
• ¼ cup full-fat plain Greek yogurt
• ¼ cup melted coconut oil
• 2 large eggs
• 2 teaspoons vanilla extract