Heat 2 Tbsps oil in a large skillet over medium-high. Salt and pepper the shrimp. Place shrimp the in the hot skillet. Cook for about 2 minutes per side, or until translucent.
Remove shrimp from the skillet and set aside.
In the same pan, heat 1 tsp oil then add garlic, onions, mushrooms. Saute until golden, about 4 minutes. Remove from pan and set aside.
Turn the heat to medium-low. Add broth & cream. Bring the sauce to a boil and return to medium-low heat. Add flour, and whisk briskly until incorporated. Add spinach, and raw squash noodles & let the sauce gently bubble for about 3 minutes. Add cooked shrimp back into the pan along with all of the pre-cooked veggies.
Combine gently, cover and let rest (with the heat off for about 4-5 minutes.)
Sprinkle with fresh chopped parsley, and/ or parmesan cheese.