- 1 medium sweet potato, peeled and cut into 1 1/2-inch cubes
- 1 small onion, finely chopped
- 1 clove garlic, minced
- 1 1/2 teaspoons best-quality curry powder
- 1/4 teaspoon ground cumin
- 2 tablespoons tomato paste
- 3 tablespoons potato starch
- 1 pound firm tofu
- 1/2 cup brown rice, cooked
- 2 tablespoons minced chives
- 3 tablespoons roughly chopped cilantro
- 3/4 teaspoon salt
- 1/8 teaspoon freshly ground pepper
- 4 low-fat whole-wheat buns
- Olive-oil cooking spray
- Place a steamer basket in a medium saucepan filled with 1 inch of water. Bring to a boil, and add sweet-potato cubes. Steam until fork tender, 6 to 7 minutes. Set aside. Place a large skillet over medium heat. Spray skillet with cooking spray. Add onion, garlic, curry powder, and cumin; cover. Cook, lifting cover to stir occasionally, until translucent, about 5 minutes. If the onion begins to dry out or burn, add 2 tablespoons water. Stir in tomato paste, and cook another 2 minutes.
- Transfer mixture to the bowl of a food processor. Add the sweet-potato cubes and the potato starch. Pulse until onions are finely ground, about 1 minute.
- Rinse and drain the tofu. Lay a clean kitchen towel or a double thickness of cheesecloth on a clean work surface. Place tofu in the center, wrap, and wring out any excess liquid; the tofu should have the texture of ground meat. Place the tofu, sweet-potato mixture, brown rice, chives, cilantro, salt, and pepper in a medium bowl. Using a rubber spatula, fold the ingredients together. Using your hands, shape the mixture into four 3 1/2-inch-round patties.
- Return skillet to medium heat. Coat with cooking spray. Place patties in pan, and cook until golden on bottom, 5 to 6 minutes. Flip patties over, and cook until golden on other side, another 5 to 6 minutes. Serve warm on whole-wheat buns.