In a pan over medium-high heat, heat 1 tablespoon olive oil. Sauté 1 tablespoon garlic and shallots for 1 to 2 minutes, until translucent.
Add vegetable stock and simmer for 2 to 3 minutes.
Transfer contents from pan into a food processor and add roasted red peppers, 1 tablespoon all-purpose seasoning, remaining 3 tablespoons olive oil, salt and pepper. Blend for about 1 minute, until smooth, then set aside.
In pan over medium-high heat, heat 2 tablespoons olive oil. Sauté remaining 1 tablespoon garlic, mushrooms and red pepper for 3 minutes, stirring continuously. Add spiralized zucchini and remaining 1 tablespoons olive oil and sauté for another 3 o 4 minutes, until zoodles are cooked.
Sprinkle remaining all-purpose seasoning, salt and pepper over top and serve with roasted red pepper sauce.
To thin sauce, add 1 to 2 tablespoons additional olive oil.