In a saute pan, heat 1 tablespoon olive oil, and then sweat the garlic, and green chili over medium heat. Add the red, orange, and yellow peppers, and saute for 1 minute.
Add the red onion, and lemon zest to the pan, and continue cooking until the peppers are slightly tender.
Remove the pan from the heat, season with salt, to taste, and add the lemon juice. Drizzle with the remaining 1 tablespoon olive oil, and serve.