Preheat oven to 350℉. In a large bowl toss together bread cubes and 2 tbsp olive oil. Spread bread cubes into a single layer on a large baking sheet. Bake for 15-20 until golden, tossing once or twice. Remove from oven and set aside.
Add remaining 2 tbsp of oil to a large skillet over medium heat. Add onion and sauté for 2 minutes until starting to soften. Stir in garlic and continue to cook for 2 minutes, stirring often. Add spinach and toss until wilted. Stir in tomatoes, sugar and salt, stirring to combine. Simmer uncovered for 20 minutes until 3/4 of the liquid has evaporated. Remove from heat and stir in fresh parsley, basil and bread cubes.
Lightly spray a shallow 4-5 cup casserole dish with non stick spray. Pour mixture into casserole and spread out. Sprinkle with parmesan and gruyere. Bake for 30 minutes until bubbly and starting to brown. Remove from oven and allow to rest for at least 5 minutes before serving.
Preheat oven to 350 ℉. Heat a large skillet over medium heat and add 2tbsp olive oil. Sauté onions for 2-3 minutes. Add garlic and continue to cook for another minute. Add spinach all at once and cook, stirring occasionally until spinach has completely wilted. Allow to cool slightly before proceeding.
To the spinach, stir in quinoa, parmesan cheese, dried herbs, lemon juice, salt, pepper and dried chili flakes. Set aside.
Rinse mushrooms and trim the bottom edge an approximate 1/4" and remove the stem down to the base. Using a spoon, scrape out the dark fanned bit, going down to the solid surface of the mushroom. Brush the outside of each mushroom with olive oil.
Fill mushrooms with an approximate heaping 1/3 cup of mixture, pressing just slightly to fill in the mushroom cavity. Top with tomato slices if desired and then sprinkle each with mozzarella cheese. Place filled mushrooms onto a parchment lined baking sheet and bake in preheated oven for 20 minutes. Turn oven to broil and broil for 1-3 minutes until cheese is melty and golden. Remove from oven and serve immediately.
Use 1/2 cup dry quinoa to 1 cup of vegetable or chicken broth and cook according to package directions. Yields about 1 1/4 cups.
Cook pasta according to package directions, approximately 10 minutes until al dente. Drain and rinse under cold water until pasta is cool. Set aside.
In a small skillet over medium high heat saute pancetta until rendered and crispy 5-7 minutes. Drain on paper towel and set aside.
Whisk together olive oil, vinegar, red pepper flakes, garlic, and mustard until smooth. Set aside.
Combine pasta, spinach, tomatoes, olives, red onion, parmesan cheese, sundried tomatoes, herbs and pancetta. Drizzle with dressing and toss to combine. Add cracked pepper and salt to taste. Makes about 5 cups and is best the day it is made.