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.
Notes
Options
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.