Follow package directions to partially cook the rice for about 40 minutes. Drain excess water and set aside.
Preheat a medium saute pan to medium-high heat and add olive oil. Add the onions and saute until soft. Add the rice to the pan and saute with the onions for about 2 minutes, stirring continuously.
Reserve 1/2 cup of stock. Then pour 1/2 cup of stock into saute pan and let it absorb into the rice. Stir in 1/2 cup of wine and let it absorb into the rice. Continue adding stock and wine in 1/2-cup increments, cooking each time until the liquid is absorbed before adding more, about 30 to 45 minutes total. Add the squash, zucchini, peas, mushrooms, sage and thyme to the pan, and cook until the vegetables are soft, about 3 to 5 minutes. Add the last 1/2 cup of the stock. Once the stock is absorbed into the rice, add the cheese, cream, salt and pepper; stir well.