Sift flour into a bowl. Add ghee and caraway seeds. Mix and gradually stir in enough water to form a firm dough. Knead on a floured surface until smooth. Cover with plastic wrap and refrigerate dough for 30 minutes. Heat ghee in a pan over medium heat. Add onion, garlic, ginger, garam masala, cumin, coriander, turmeric, and chile powder. Cook and stir until onion is soft, about 5 minutes. Add corn, peas, and coconut milk. Bring to a boil. Remove filling from heat and cool to room temperature. Roll dough on a floured surface to 1/16-inch thickness. Cut into 3 3/4-inch rounds and place a rounded teaspoon of filling into the center of each round. Brush edges with water and press together using your finger or a samosa presser. Heat oil in a deep-fryer or large saucepan to 350 degrees F (175 degrees C). Deep-fry samosas until browned, about 5 minutes per batch.