Don't know how to cook pilaf: try to cook this dish

Ingredients:
Pork - 1 kg.
Vegetable oil - 100 ml.
Onion - 1 pc.
Carrots - 1 pc .
Champignons - 250 gr.
Hot capsicum - 1/4 pc .
Cumin - 1/3 tsp
Ground black pepper - 1/3 tsp
Salt - to taste.
Buckwheat - 250 gr.
Water - 500 ml.
Bon Appetit!