Pre-heat oven to 400 degrees F. Place the grape tomatoes, shallot slices, and whole garlic cloves on a large rimmed baking sheet. Drizzle 1 tbsp olive oil over top, then season generously with salt and pepper. Toss to coat.
Roast the tomatoes, shallots, and garlic cloves for 20 minutes, until the tomatoes blister and start to burst open.
Remove baking sheet from oven. With a fork, smash the ingredients together, including the garlic cloves, on the baking sheet. Stir together and season with 1/8 tsp red pepper flakes, if desired.
Heat remaining 1 tsp olive oil in a medium sized skillet over medium high heat. Add the spiralized zucchini noodles and cook for 3-5 minutes, until noodles are heated through but still have bite and texture (think al dente).
Divide the zucchini into four bowls, and top with the sauce. Garnish with cheese, if desired. Serve immediately.