Preheat oven to 375°F and grease a 9×13 inch baking dish with cooking spray. In a skillet, heat olive oil over medium heat. Cook the onion, garlic and mushrooms until tender, about 3 minutes.
Stir in spinach and wine and cook until spinach is wilted and wine is reduced by half, about 3 minutes. Remove from heat and set aside to cool.
In a large bowl, whisk eggs, salt and pepper until combined. Add Tribeca Oven Multigrain Loaf cubes, cooled vegetable mixture, ½ cup gruyere, ½ cup parmesan, sage and thyme. Mix well and pour into baking dish.
Top with remaining cheese. Bake for 30 minutes, or until cheese is golden-brown and bubbly. Serve warm.