Heat Olive Oil (1/4 cup) in a cast-iron skillet over medium-high heat. Add Garlic (4 clove) and cook, stirring frequently, for 3 minutes.
Add Zucchini (1), White Mushroom (8 ounce), Yellow Squash (1), Cherry Tomato (10 ounce), Salt (1/2 teaspoon), and Ground Black Pepper (1/2 teaspoon) to the skillet and stir so veggies are well-coated.
Preheat your oven’s broiler (optional).
Cook for 5 minutes, stirring occasionally until vegetables are tender. Sprinkle Shaved Parmesan Cheese (2/3 cup) over top of the vegetables.
Option 1: Cover skillet (don’t remove from heat) and allow the cheese to melt for 1-2 minutes. Option 2: Place cast iron skillet in the oven and broil for 1 minute, or until cheese is melted.