Heat oven to 180C/160C fan/gas 4. Heat
half the oil in a pan and gently soften the
onions and garlic for 15-20 mins until really
soft and sticky but not browned. Put the
onions, tomatoes (halve the large ones),
herbs, sugar and breadcrumbs in a baking
dish, season well and toss together.
Drizzle with the remaining oil, scatter
with a few more herb sprigs and bake
for 1 hr until going golden on top and
the tomatoes are juicy.