Preheat oven to 350°. Spray 8 muffin cups with baking spray with flour.
In a large bowl, whisk together flour, sugar, zest, baking powder, 1½ teaspoons poppy seeds, and salt. In a small bowl, whisk together buttermilk, lemon juice, egg, and vanilla. Make a well in center of flour mixture; stir in buttermilk mixture, just until moistened. Spoon batter into prepared cups.
In another small bowl, stir together Coffee Cake Crumble and remaining 1 teaspoon poppy seeds. Sprinkle onto batter.
Bake until a wooden pick inserted in center comes out clean, 25 to 30 minutes. Let cool in pan for 5 minutes. Remove from pan, and let cool completely on a wire rack. Serve with Meyer lemon curd.
Recipe by Paula Deen Magazine at https://pauladeenmagazine.com/meyer-lemon-poppy-seed-streusel-muffins/