Prepare the zucchini. Spiralize or slice lengthwise and continue slicing into thin, long slices —julienne style.
Prepare linguine noodles according to the package. Drain most, saving a little of the water in the pan, then set aside.
In a large skillet over medium heat, add in your olive oil and let it get hot. Add marinara sauce, garlic, and chopped mushrooms. Sauté for 1-2 minutes.
Add in the zucchini, mixing all ingredients together. Cook to your desired doneness (3-7 minutes depending on the texture you prefer).
Add cooked noodles to the pan and fold into the vegetables and sauce.
Turn heat to low and let simmer for a few minutes so all ingredients and flavors can marry.
Plate all components and add capers on top, then sprinkle with grated parmesan cheese!
Salt and pepper to taste.