Heat the olive oil in a large skillet over medium-high heat. Add the chopped onion and sauté, stirring occasionally, until it becomes translucent, approximately 1 to 2 minutes.
Incorporate the diced bell peppers, chopped chilies, and minced garlic into the skillet. Season with a pinch of salt and a sprinkle of ground black pepper. Cook the mixture, stirring from time to time, until the peppers are vibrant in color yet still firm, about 4 to 6 minutes.
Reduce the heat to medium-low and pour the beaten eggs into the skillet. Gently stir with a wooden spoon or rubber spatula to combine the ingredients. Continue stirring occasionally until the eggs are fully cooked but remain soft, which may take 3 to 8 minutes.
Serve immediately, paired with toast, steamed rice, or wrapped in a flour tortilla for a versatile and satisfying meal.