How to Make It
Heat 1 tablespoon oil in a large cast-iron skillet over medium-high. Add onion wedges; cook until charred, about 2 minutes per side. Transfer to a plate; sprinkle with 1/4 teaspoon salt.
Heat 1 tablespoon oil in skillet. Add Broccolini in a single layer; cook, turning occasionally, until charred, 8 to 10 minutes. Transfer to a plate; sprinkle evenly with 1/4 teaspoon salt.
Add 1 tablespoon oil, paprika, chickpeas, and garlic to skillet. Cook, stirring occasionally, until starting to brown, 3 minutes. Remove from heat.
Combine rind, juice, mustard, pepper, remaining 2 tablespoons oil, and remaining 1/2 teaspoon salt in a medium bowl. Add chickpea mixture and parsley; toss to combine. Spoon about 3/4 cup chickpea mixture into each of 4 bowls. Top with Broccolini and onion; serve with lemon wedges.