Sweat onion and pepper in coconut oil with a pinch of salt and pepper.

Assemble sandwich. Toast in oven or on a panini press.

Variations; Roasted bell peppers or garlic, roasted tomatoes, oven dried tomatoes, flavored butter or oil, Sriracha sauce or dried seasoning, bacon, habanero, pineapple, mango, vinegar, avocado, poblano, honey, peanut crust,