Cook rice al dente. Peel the carrots, cut into slices and cook in a little broth with butter until al dente.
In the meantime, stir together the sour cream, lemon juice, water, curry, sugar, salt and pepper. Clean the spring onions and cut into wide strips.
Heat the fat in a pan, sauté the spring onions, add the banana slices, season. Add the carrots and pour the curry sauce over it. Stir gently and simmer for about 3 minutes. Serve with the rice.
You can also vary the curry. For example with peas or by adding pineapple and coconut milk.