Clean and wash the lentils. Add them to a large saucepan along with the garlic and salted meat. Cover the lentils with water (about 3 cups) and bring to a boil.
Reduce heat and cook until the lentils begin to soften.
Add the potatoes, pumpkin, dumplings (if using), coconut milk, onion, celery, pimento pepper, clove, thyme, salt, black pepper, and sugar.
Pour in 2 to 3 cups of hot water as needed and stir to combine.
Cook on medium-low heat for about 30 minutes, or until the vegetables are tender and the soup thickens.
Add more water if needed depending on your desired thickness.
Taste and adjust seasoning, then serve hot.