@Peanut why don't just make red pepper sauce then? No tomatoes at all.
https://www.foodnetwork.com/recipes/ree-drummond/quick-and-easy-roasted-red-pepper-pasta-2247961
https://www.geniuskitchen.com/recipe/spaghetti-with-sweet-red-pepper-sauce-27107
I would think the jarred peppers would be easier, but you can always grow your own peppers
https://www.foodnetwork.com/recipes/ree-drummond/quick-and-easy-roasted-red-pepper-pasta-2247961
https://www.geniuskitchen.com/recipe/spaghetti-with-sweet-red-pepper-sauce-27107
I would think the jarred peppers would be easier, but you can always grow your own peppers