Heat the oil in a Dutch oven over medium heat, add the onions and fry for 15 minutes until golden brown. Add garlic, turmeric, mint flakes, salt and pepper, and stir-fry for 20 seconds.
Add the mung beans and broth, and bring to a boil. Reduce heat to medium and simmer, covered, for 15 minutes, stirring occasionally. Add the walnuts and bulgur, bring back to a boi