01 - Preheat your oven broiler or grill to high heat.
02 - Arrange the red bell peppers, unpeeled garlic cloves, tomato, chili pepper, and red onion on a baking sheet.
03 - Roast the vegetables for 15–20 minutes, turning as needed, until the peppers are nicely charred and the vegetables are tender. Remove the garlic after approximately 10 minutes if it softens sooner.
04 - Transfer the roasted bell peppers to a bowl. Cover with a plate or plastic wrap and let them steam for 5 minutes. This will make peeling easier. Once steamed, carefully peel off the skins and remove the stems and seeds.
05 - Gently peel the softened garlic cloves.
06 - Combine the roasted peppers, peeled garlic, tomato, chili pepper, and red onion in a food processor. Pulse a few times for a chunky consistency or blend until your desired smoothness is achieved.
07 - Add the chopped cilantro, lime juice, sea salt, cumin, black pepper, and olive oil (if using) to the food processor. Pulse to integrate the ingredients. Taste and adjust seasonings as necessary.
08 - Serve the salsa at room temperature or chilled.