In a medium mixing bowl with a cover, stir together garlic, peppers, tomatoes, onion, hot peppers, cilantro, and green onions. In a small mixing bowl, whisk together olive oil, vinegar, lime juice, pepper, chili powder and salt. Pour dressing over vegetables and mix completely. Cover and refrigerate several hours to let flavors meld, then return to room temperature before serving. Yield: About 4 cups