Preheat oven to 350°. In a large bowl, mix the first five ingredients. In a small bowl, whisk eggs, milk, syrup, oil and vanilla until blended; stir into dry ingredients. Let stand 5 minutes. Stir in apple., Transfer to an 11x7-in. baking dish coated with cooking spray. Sprinkle with sunflower kernels. Bake, uncovered, 25-30 minutes or until set and edges are lightly browned.