Preheat oven to 400°. Cut squash lengthwise in half; remove and discard seeds. Using a sharp knife, cut a thin slice from bottom of each half to allow them to lie flat. Place squash in a shallow roasting pan, hollow side down; add 1/4 in. of hot water and halved tomatoes. Bake, uncovered, 45 minutes.

Meanwhile, in a large skillet, cook sausage, mushrooms, apple, onion and dried seasonings over medium heat 8-10 minutes or until sausage is no longer pink, breaking up sausage into crumbles; drain. Add spinach, thyme, salt and pepper; cook and stir 2 minutes. Remove from heat.

Carefully remove squash from roasting pan. Drain cooking liquid, reserving tomatoes. Return squash to pan, hollow side up.