Sweet Potato Falafel Lettuce Cups

Name: Sweet Potato Falafel Lettuce Cups
Ingredients: * 1 medium sweet potato, peeled and finely grated; * 1 (15-oz) can chickpeas, rinsed and drained; * 2/3 cup rolled oats, ground to a find powder in a blender or food processor; * 1/4 cup fresh parsley, finely chopped, divided; * 1/2 small yellow onion, minced; * 1 large egg, beaten; * 2tablespoons natural peanut butter; * 2cloves garlic, mincec; * 1/2 teaspoon paprika; * 1/2 teaspoon curry powder; * Salt; * Pepper; * 1/4 cup plain 2-percent-fat Greek yogurt; * 1pinch lemon zest (optional); * 1/2 lemon, juiced; * 1tablespoon fresh dill, chopped; * 1teaspoon olive oil; * 10 butter lettuce leaves (or romaine leaves)