Heat the butter
in a saute pan and gently fry
the onions until soft and slightly golden. Add the garlic 1 minute, along with the thyme. Season with salt and pepper and set aside.
While the onions are cooking, bring a large pot of water to the boil. Salt it, as for pasta
, then boil the rice until tender. Drain
well. Toss with the onion mixture and heat through.