First, combine garlic, ginger, orange zest, soy sauce, and a splash of sesame oil in a bowl. Toss the baby octopus in this mixture and let it marinate for at least 15 minutes. This helps the flavors penetrate the octopus for a deeper, more aromatic taste.
While the octopus marinates, heat olive oil in a pan. Add broccolini and sauté lightly until crisp-tender. Sprinkle sesame seeds during the last minute for a nutty crunch. This keeps the greens fresh and vibrant without losing texture.
In a hot skillet, sear the marinated octopus for 3–4 minutes on each side. Finish with a sprinkle of chilli flakes and a squeeze of fresh orange juice. The octopus should be tender but slightly charred for that smoky flavor.
Gently toss the cooked octopus and broccolini together. Drizzle any leftover citrus marinade over the top. Garnish with fresh herbs before serving for a visually stunning dish.