Slightly Exotic Skillet Broccoli and Cauliflower

Name: Slightly Exotic Skillet Broccoli and Cauliflower
Ingredients: 7 tablespoons extra-virgin olive oil, divided; 1 large onion, thinly sliced (pole to pole); 1 head of cauliflower, trimmed and separated into florets, large florets cut in halves; 1 head of romanesco or broccoli, trimmed and separated into florets, large florets cut in halves; 3/4 teaspoon red pepper flakes; 3 medium cloves garlic, coarsely chopped, and divided; Freshly ground black pepper; 1 teaspoon brine from preserved lemons; 1 preserved lemon, rinsed; 12 to 15 Castelvetrano olives, pitted and coarsely chopped; 2 small to medium red peppers, roasted, seeded, peeled, and diced; 1 tablespoon Sherry vinegar; 1/2 teaspoon ground cumin; 1/2 teaspoon smoked paprika; 2 to 3 tablespoons cilantro leaves (or substitute Italian parsley)