Wash tomatoes and wash and cut the mushrooms; set aside
Cook pasta according to package directions. Drain and set aside.
In a large skillet or wok, over medium heat, add 1-2 tbsp olive oil and cook the ground beef.
After the ground beef is browned and cooked, add the chicken stock, tomatoes, mushrooms and spinach. (For the spinach, I literally just throw the entire bag straight in)
Gently toss ingredients together until the spinach is wilted
Add the pasta and about a tablespoon (or less) of olive oil; toss
Season with salt and pepper
Sprinkle with mozzarella or parmesan cheese and serve! SERVE IMMEDIATELY