Heat a large pan over medium heat; add the olive oil when it's hot.
Add the beans, onion and chili and saute over a medium heat until cooked to your desired doneness. If the pan dries out after a few minutes, add a bit of water intermittently. This will also encourage the beans to soften.
Serve with chicken, meat or fish.
Add fresh or dried herbs such as thyme, oregano or basil.
Splash a little red wine or red wine vinegar over the beans half way through cooking.
Use tamari (wheat free soy sauce) to add a more savory flavor
NOTE: You can add as much or as little chili as you like, depending on how spicy you like it.