Preheat the oven to 275°F. Bake the tortilla chips in the low oven for 10 minutes. Once done remove from the oven and put the oven to Broil.
Make the Veggie Layer: Heat 1tbsp oil in a saute pan; add zucchini and corn and cook on medium flame until lightly browned around the edges.
Next add onion, garlic and jalapeno; cook until the veggies are crisp tender, about 5 minutes.
Add tomatoes, ground cumin and thyme. Cook for 1~2 minutes. Season with salt and pepper and remove from the stove.
Make Refried Beans: Heat 1tbsp oil in a sauce pan; add the beans, salt and pepper. Mash the beans with the back of a spoon until you get the desired consistency. Next add the broth and simmer for 3~4 minutes. Remove from the stove and set aside.
To Assemble the Nachos: Spread a layer of refried beans on the toasted tortillas, followed by ⅔rd of the veggie mixture. Top it with grated cheese.
Put the baking pan back in the oven and broil for 4~5 minutes or until the cheese is melted and bubbling. Remove from the oven and set aside for at least 5 minutes. Then load up with the toppings and enjoy!!