Onion & white bean bake

For 4 as a side:
3 brown onions, sliced
2 tins cannellini beans, drained & rinsed
4 sprigs thyme, leaves picked
90g cheddar cheese
1/3 cup chicken/veg stock (optional)

Oven at 200C. Slice onions and fry in oil until soft & golden brown. Stir through thyme leaves & layer in casserole with beans and cheese, finishing with cheese. Pour over stock (if remembered.) Bake about 25 minutes, until golden.