02Add pumpkin and stock; sprinkle with salt and pepper. Bring to a boil, cover and turn heat to low. Cook, stirring once or twice, until pumpkin is tender, 15 to 30 minutes. Check periodically to make sure there is adequate liquid; if the pumpkin is done and the liquid is thin, remove lid and turn the heat to medium-high.
Boil mixture until thick; taste and adjust seasoning.03Heat olive oil in a skillet over medium heat. When hot, add garlic. If using ground beef, add it and sprinkle with salt and pepper. Cook, stirring occasionally, until the meat begins to brown, about 5 minutes. Add the tomatoes and coriander and reduce heat to low; simmer until the mixture thickens, 5 to 10 minutes.04Combine the yogurt, mint, minced garlic, salt and pepper in a bowl and stir.05Spoon the ground beef or tomato sauce over the pumpkin. Top with yogurt sauce and more fresh mint and serve.