This tasty main is bursting with flavour and colour. Taking less than 30 minutes to create it's a perfect weeknight meal.
Heat oil in a large frying pan on medium-high. Season chicken with salt and pepper and add to the pan. Cook until browned all over (not fully cooked), then place onto a plate.
Reduce heat to medium and melt butter in the pan. Add mushrooms, onion and garlic and cook for 3-4 minutes, until tender. Stir in flour and smoked paprika. Gradually add chicken stock, then mustard.
Add chicken back to pan, stir to combine, then simmer for 15 minutes, until chicken is cooked through and sauce has thickened. Reduce heat to low and stir in sour cream. Season to taste with salt and pepper.