Cook pasta on the back burner and reserve until assembly.
Heat a large saucepan over medium heat and add olive oil. Sauté pumpkin for 5 minutes stirring occasionally to get some color.
Add onions, peppers and jalapeño and continue to cook stirring occasionally for 8-10 minutes until onions are fragrant and translucent and peppers are soft. Pumpkin will be almost cooked through.
Add tomato paste, chili powder, smoked paprika, salt, cumin and garlic powder and cook stirring often for 5 minutes. The tomato paste will darken and caramelize.
Add water, corn and pinto beans, stir and cover. Cook for 10 minutes covered stirring every 3-4 minutes to make sure there is no burning on the bottom.
While chili cooks, grate smoked cheddar wheel on a box grater and reserve.
Check that pumpkin in the chili is fork tender, if so, it is finished. Add cilantro if desired.
In a bowl, layer chili, cheese, pasta, more chili, cheese and pasta. Stir then garnish with cilantro and lime wedge.