Before starting, preheat the oven to 450°F. Wash and dry all produce. Add 10 cups water and 2 tsp salt to a large pot. (NOTE: Use same for 4 ppl.) Cover and bring to a boil over high heat. While water comes to a boil, thinly slice mushrooms.

Add mushrooms, half the Italian Seasoning and 1 tbsp oil (dbl for 4 ppl) to a parchment-lined baking sheet. Season with salt and pepper, then toss to coat. Roast in the middle of the oven, until golden-brown, 16-18 min.

While mushrooms roast, heat a large non-stick pan over medium heat. When hot, add 1 tbsp butter (dbl for 4 ppl), then onions and remaining Italian Seasoning. Cook, stirring often, until tender, 2-3 min. Reduce heat to medium-low, then add cream and broth concentrate. Cook, stirring occasionally, until sauce is slightly thickened, 2-3 min. Remove pan from heat. Add spinach, then stir until wilted, 1-2 min. Season with salt and pepper.

When sauce is ready, add ravioli to the pot of boiling water. Cook, stirring occasionally, until tender, 2-3 min. Reserve 1/4 cup pasta water (dbl for 4 ppl). Drain and return to the same pot, off heat.

Add sauce, reserved pasta water and half the Parmesan to the large pot with ravioli. Season with salt and pepper, then stir gently to coat.

Divide ravioli between bowls. Top with mushrooms, then sprinkle remaining Parmesan over top.