Why "must" you impress, OP? I just wouldn't play his game if I were you - I agree with a pp: your FIL is an arse.
But if you're determined, you could try this. I've made it loads of times, so the quantities and instructions are absolutely right. It always gets compliments:
Beef with Stout
Serves 4
700g (1 and a half pounds) stewing beef
30ml (2 tbsp) vegetable oil
2 large onions, skinned and chopped
1 tbsp flour
275ml stout
200 ml beef stock
2 tbsp tomato puree
200g (4 oz) stoned prunes
225g (8 oz) carrots, peeled and sliced
salt and pepper
sliced white bread and butter for croutons
Cut the meat into 1-and-a-half inch cubes, trimming all fat. Heat the oil and fry until well browned on all sides. Remove with slotted spoon.
Add the onions to the remaining oil in the pan/casserole and fry gently until lightly browned. Stir in the flour and cook for one minute. Stir in the stout, stock, tomato puree, prunes and carrots. Bring to the boil and season well.
Replace the meat, cover and cook in the oven at 170 degrees C (325 F) Mark 3 for 1-and-a-half to 2 hours.
Make croutons - fry squares of bread in vegetable oil and butter, and put them on top of the dish when you serve (don't make them too early, as they go soft if kept for more than a few hours)