Heat oil in a frying pan over a MEDIUM-HIGH heat add leek and cook stirring for 2-3 minutes. Add mushrooms and continue cooking, stirring occasionally for 5 minutes.
Add 1/3 cup (80 mL) water and recipe base, stir to combine. Reduce heat to a simmer, cover and cook for 8-10 minutes or until mushrooms are softened.
Stir through sour cream and serve with pasta and a sprinkle of fresh parsley.
Recipe Tip
Try swapping out mushrooms with 2 fillets of thinly sliced chicken breast browned with the leeks. Simmer for 10 minutes longer of until chicken is cooked through.