Begin by bringing a large pot of salted water to a boil. Add the 8 oz. of casarecce pasta and cook according to the package instructions until al dente. Once cooked, reserve about 1 cup of pasta water, then drain the pasta in a colander.
In a large skillet over medium heat, add a drizzle of olive oil. Once the oil is hot, add the minced garlic and sauté for about 30 seconds until fragrant. Be careful not to burn the garlic!
Next, add the sliced baby Bella mushrooms to the skillet. Sauté for about 5-7 minutes until they are golden brown and have released their moisture. Then, add the halved cherry tomatoes and continue to cook for another 3-4 minutes, until the tomatoes soften.
Stir in the baby spinach, allowing it to wilt for about 1-2 minutes.
Add the drained pasta to the skillet with the sautéed vegetables. Pour in a bit of the reserved pasta water to create a light sauce, and toss everything together. Season with salt, pepper, and red pepper flakes to taste.
Serve the Mushroom Spinach Pasta warm, drizzling a little more olive oil on top if desired. Enjoy your delicious, homemade meal!