Pound meat between a folded sheet of cling film to desired thinness, slice into strips
Slice your veggies and stir fry
Remove veggies from pan, add the meat.
Shread the lettuce to make a simple salad with the sage and pepper and top with the cooked meat.
Put veggies back in pan, add the mustard and cream and heat through, tossing well to coat the veggies with the sauce.
Top salad with the sauce and veggies