Add the oil to a large pot and when it’s hot, add the garlic and onion. Cook over medium-high heat for 3 to 4 minutes, stirring occasionally.
Incorporate the zucchini and the red bell pepper, stir, and cook until the veggies start to golden brown.
Add all the remaining ingredients, stir, and cook over medium heat for 5 minutes, partially covered.
Remove the lid and cook for 3 to 4 more minutes, stirring frequently, until the pasta is almost cooked through and most of the liquid has been absorbed.
Stir through the vegan cheese (optional) and cook for 1 minute until the cheese is melted and the pasta is fully cooked.