Mix oil, lemon juice, water, ginger, chilli and garlic in a large bowl. Add onions and sweet potatoes and toss to coat the veggies.
Season with pepper.
Place in an oven dish, with all the liquid and seasonings. Roast for 45 minutes or until the onions and potatoes are soft.
Stir onions with any pan juices into the cottage cheese. Cut a deep slit into each sweet potato and fill with about 2 tbsp (30 ml) of the mixture. Garnish with fresh coriander.
Serve with grilled or roasted fish, chicken or pork and fill your plate with any green veggies, lightly cooked and seasoned with lemon juice and black pepper. Or a green salad will also be delicious.
To make wedges: Cut sweet potato into wedges and coat in oil mixture as above. Roast for just 30 minutes and serve with sauce as a dip.
Add fresh grated lemon rind to the cottage cheese sauce, for more flavour.
