Problem number one, the supermarket had run out of red vermouth, so a quick google and I discovered that red wine vinegar (1 part) and water (3 parts) apparently make a good substitute. Problem number two, I don’t own a saucepan that can be chucked in the oven like Jamie, so a roasting tin would have to do!So, feeling rather productive and problem solvey, I heated some oil in my roasting tin over the hob and put the chicken in skin side down to crisp up, Oh! I seasoned the chicken with salt and pepper first. Whilst doing this (still feeling productive and doing chefy-style two things at once) I sorted the garlic out. Leaving it unpeeled I squashed it with my hand. I turned the chicken and chucked in the garlic and cooked for a few minutes whilst picking the grapes. Finally, I Chucked the grapes and vermouth (substitute) into the pan and put it all in an oven heated to 180 degrees for 50 minutes. Once cooked I chucked some tarragon over it to serve. I decided to serve it with roasted baby potatoes, which I parboiled for about 5/6 minutes and chucked in the oven for about 30 minutes or so.